diff --git a/etherlink/tezt/tests/expected/evm_sequencer.ml/Alpha- Regression test for the FA deposit and withdrawal events.out b/etherlink/tezt/tests/expected/evm_sequencer.ml/Alpha- Regression test for the FA deposit and withdrawal events.out
index 957b7dec7d0a56a5f0ea6a1eb877404b42d54567..a79bfc7bacc3fca3126a55bbe6b86a1375bda947 100644
--- a/etherlink/tezt/tests/expected/evm_sequencer.ml/Alpha- Regression test for the FA deposit and withdrawal events.out	
+++ b/etherlink/tezt/tests/expected/evm_sequencer.ml/Alpha- Regression test for the FA deposit and withdrawal events.out	
@@ -3,19 +3,19 @@
 Address: 0xff00000000000000000000000000000000000002
 Topics:
 - 0x7ee7a1de9c18ce695c95b8b19fbdf26cce3544e3ca9e08c9f487776783d7599f
-- 0x3fc89701f8bfcb0f6cd61d04853294efdf1f3f64530a321a7275a69d938c08fa
+- 0xd73f08b85d698e4307583ab28caa091500cfe976c9aa46c957e963246b4c217c
 Data: 0x0000000000000000000000006ce4d79d4e77402e1ef3417fdda433aa744c6e1c0000000000000000000000006ce4d79d4e77402e1ef3417fdda433aa744c6e1c000000000000000000000000000000000000000000000000000000000000002a00000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000002
 # FA Withdrawal
 ## Log 0
 Address: 0xff00000000000000000000000000000000000002
 Topics:
 - 0xab68450c9e546f6062a861eebf8ec5bbd41b4425e26b20199c91227c7f9038ca
-- 0x3fc89701f8bfcb0f6cd61d04853294efdf1f3f64530a321a7275a69d938c08fa
-Data: 0x0000000000000000000000006ce4d79d4e77402e1ef3417fdda433aa744c6e1c0000000000000000000000006ce4d79d4e77402e1ef3417fdda433aa744c6e1c000000000000000000000000000000000000000000000000000000000000000001495c894beb8546d3e9deec5562da20546fe556ab000000000000000000000000000000000000000000000000000000000000000000000000000000000000280000000000000000000000000000000000000000000000000000000000000000
+- 0xd73f08b85d698e4307583ab28caa091500cfe976c9aa46c957e963246b4c217c
+Data: 0x0000000000000000000000006ce4d79d4e77402e1ef3417fdda433aa744c6e1c0000000000000000000000006ce4d79d4e77402e1ef3417fdda433aa744c6e1c000000000000000000000000000000000000000000000000000000000000000001570e3b77b3e1db0ef4da1a0be85767bd91e158d1000000000000000000000000000000000000000000000000000000000000000000000000000000000000280000000000000000000000000000000000000000000000000000000000000000
 # FA Fast Withdrawal
 ## Log 0
 Address: 0xff00000000000000000000000000000000000002
 Topics:
 - 0x7e40c982e82bccb5e8bbd29f38bcfa3996f341ef9f51e2a9cffe086ec87a11c7
-- 0x3fc89701f8bfcb0f6cd61d04853294efdf1f3f64530a321a7275a69d938c08fa
-Data: 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
+- 0xd73f08b85d698e4307583ab28caa091500cfe976c9aa46c957e963246b4c217c
+Data: 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
diff --git a/etherlink/tezt/tests/expected/evm_sequencer.ml/Alpha- Regression test for the claimed FA deposit event.out b/etherlink/tezt/tests/expected/evm_sequencer.ml/Alpha- Regression test for the claimed FA deposit event.out
index 022b13a094a1c8faafcc0e300320f58e98aa851b..b41a385848c4457ff975f794878135a3f877aed7 100644
--- a/etherlink/tezt/tests/expected/evm_sequencer.ml/Alpha- Regression test for the claimed FA deposit event.out	
+++ b/etherlink/tezt/tests/expected/evm_sequencer.ml/Alpha- Regression test for the claimed FA deposit event.out	
@@ -3,7 +3,7 @@
 Address: 0xff00000000000000000000000000000000000002
 Topics:
 - 0xb02d79c5657e344e23d91529b954c3087c60a974d598939583904a4f0b959614
-- 0x0c66b6ebec63009630d4c182a121163ac7c411b07cc19dd2805814cd911c7686
+- 0x20439b11ccadf7fd68ed2cb1bacc80a1d3df10f2374a62cefe6d4f45b9ee101a
 - 0x000000000000000000000000d77420f73b4612a7a99dba8c2afd30a1886b0344
 Data: 0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000d77420f73b4612a7a99dba8c2afd30a1886b0344000000000000000000000000000000000000000000000000000000000000003200000000000000000000000000000000000000000000000000000000000000070000000000000000000000000000000000000000000000000000000000000003
 # Claimed deposit
@@ -11,5 +11,5 @@ Data: 0x000000000000000000000000000000000000000000000000000000000000000000000000
 Address: 0xff00000000000000000000000000000000000002
 Topics:
 - 0x7ee7a1de9c18ce695c95b8b19fbdf26cce3544e3ca9e08c9f487776783d7599f
-- 0x0c66b6ebec63009630d4c182a121163ac7c411b07cc19dd2805814cd911c7686
+- 0x20439b11ccadf7fd68ed2cb1bacc80a1d3df10f2374a62cefe6d4f45b9ee101a
 Data: 0x000000000000000000000000d77420f73b4612a7a99dba8c2afd30a1886b0344000000000000000000000000d77420f73b4612a7a99dba8c2afd30a1886b0344000000000000000000000000000000000000000000000000000000000000003200000000000000000000000000000000000000000000000000000000000000070000000000000000000000000000000000000000000000000000000000000003
diff --git a/src/proto_alpha/lib_parameters/default_parameters.ml b/src/proto_alpha/lib_parameters/default_parameters.ml
index 4fbb299ba570a557fb4d829378406faf39b12423..d0d7c6a55de78e41180912c60417467f7464f1a1 100644
--- a/src/proto_alpha/lib_parameters/default_parameters.ml
+++ b/src/proto_alpha/lib_parameters/default_parameters.ml
@@ -158,7 +158,7 @@ let default_dal =
       feature_enable = true;
       incentives_enable = true;
       number_of_slots = 32;
-      attestation_lag = 8;
+      attestation_lag = 5;
       attestation_threshold = 66;
       cryptobox_parameters = default_cryptobox_parameters;
       minimal_participation_ratio = Q.(64 // 100);
diff --git a/src/proto_alpha/lib_protocol/alpha_context.mli b/src/proto_alpha/lib_protocol/alpha_context.mli
index 7f0b406a948699ce08d748fe065256012377255d..902325b48df22f4a1dff0ec978e3edd262df393c 100644
--- a/src/proto_alpha/lib_protocol/alpha_context.mli
+++ b/src/proto_alpha/lib_protocol/alpha_context.mli
@@ -1093,6 +1093,8 @@ module Constants : sig
 
   val dal_number_of_shards : context -> int
 
+  val dal_attestation_lag : context -> int
+
   val sc_rollup_arith_pvm_enable : context -> bool
 
   val sc_rollup_riscv_pvm_enable : context -> bool
diff --git a/src/proto_alpha/lib_protocol/apply.ml b/src/proto_alpha/lib_protocol/apply.ml
index e168e82ef706990242153749ceef017862fb20f6..b412a56dcbc7b2cdfa5ca07064a50ba925a7b718 100644
--- a/src/proto_alpha/lib_protocol/apply.ml
+++ b/src/proto_alpha/lib_protocol/apply.ml
@@ -2331,14 +2331,28 @@ let record_preattestation ctxt (mode : mode) (content : consensus_content) :
             consensus_key
             Attesting_power.zero (* Fake power. *) )
 
-let record_dal_content ctxt slot ~dal_power = function
-  | None -> Result.return ctxt
+let record_dal_content ctxt level slot ~dal_power dal_content =
+  let open Lwt_result_syntax in
+  match dal_content with
+  | None -> return ctxt
   | Some {attestation} ->
-      Dal_apply.apply_attestation
-        ctxt
-        ~tb_slot:slot
-        attestation
-        ~power:dal_power
+      let* proto_activation_level = Protocol_activation_level.get ctxt in
+      let lag = Constants.dal_attestation_lag ctxt in
+      let attestation =
+        if Raw_level.(level < add proto_activation_level lag) then
+          (* TODO: https://gitlab.com/tezos/tezos/-/issues/8065
+             CODE TO BE REVERTED IN PROTOCOL V *)
+          Dal.Attestation.empty
+        else attestation
+      in
+      let*? ctxt =
+        Dal_apply.apply_attestation
+          ctxt
+          ~tb_slot:slot
+          attestation
+          ~power:dal_power
+      in
+      return ctxt
 
 let record_attestation ctxt (mode : mode) (consensus : consensus_content)
     (dal : dal_content option) :
@@ -2372,7 +2386,9 @@ let record_attestation ctxt (mode : mode) (consensus : consensus_content)
           ~initial_slot:consensus.slot
           ~power:attesting_power
       in
-      let*? ctxt = record_dal_content ctxt consensus.slot ~dal_power dal in
+      let* ctxt =
+        record_dal_content ctxt consensus.level consensus.slot ~dal_power dal
+      in
       return (ctxt, mk_attestation_result consensus_key attesting_power)
   | Partial_construction _ ->
       (* In mempool mode, attestations are allowed for various levels
@@ -2402,24 +2418,25 @@ let record_attestations_aggregate ctxt (mode : mode)
   match mode with
   | Application _ | Full_construction _ ->
       let slot_map = Consensus.allowed_attestations ctxt in
-      let*? ctxt, rev_committee, total_consensus_power =
-        let open Result_syntax in
-        List.fold_left_e
+      let* ctxt, rev_committee, total_consensus_power =
+        List.fold_left_es
           (fun (ctxt, consensus_keys, consensus_power) (slot, dal) ->
-            let* {
-                   consensus_key = {delegate; consensus_pkh; _};
-                   attesting_power;
-                   dal_power;
-                 } =
+            let*? {
+                    consensus_key = {delegate; consensus_pkh; _};
+                    attesting_power;
+                    dal_power;
+                  } =
               find_in_slot_map slot slot_map
             in
-            let* ctxt =
+            let*? ctxt =
               Consensus.record_attestation
                 ctxt
                 ~initial_slot:slot
                 ~power:attesting_power
             in
-            let* ctxt = record_dal_content ctxt slot ~dal_power dal in
+            let* ctxt =
+              record_dal_content ctxt content.level slot ~dal_power dal
+            in
             let key = ({delegate; consensus_pkh} : Consensus_key.t) in
             return
               ( ctxt,
diff --git a/src/proto_alpha/lib_protocol/constants_storage.ml b/src/proto_alpha/lib_protocol/constants_storage.ml
index 0b8feb92e7661871b90f2c3b7b45f7a87b6c8f67..7ecc17586ab36b4ae3bac1fe8f9a3d5d931ff207 100644
--- a/src/proto_alpha/lib_protocol/constants_storage.ml
+++ b/src/proto_alpha/lib_protocol/constants_storage.ml
@@ -228,6 +228,10 @@ let dal_number_of_slots c =
   let constants = Raw_context.constants c in
   constants.dal.number_of_slots
 
+let dal_attestation_lag c =
+  let constants = Raw_context.constants c in
+  constants.dal.attestation_lag
+
 let dal_number_of_shards c =
   let constants = Raw_context.constants c in
   constants.dal.cryptobox_parameters.number_of_shards
diff --git a/src/proto_alpha/lib_protocol/constants_storage.mli b/src/proto_alpha/lib_protocol/constants_storage.mli
index 56f917327377fe7d1afa240b91c091bd3db1a040..35bd388b64064651a5a29d955a17ba3603a427cc 100644
--- a/src/proto_alpha/lib_protocol/constants_storage.mli
+++ b/src/proto_alpha/lib_protocol/constants_storage.mli
@@ -130,6 +130,8 @@ val dal_number_of_slots : Raw_context.t -> int
 
 val dal_number_of_shards : Raw_context.t -> int
 
+val dal_attestation_lag : Raw_context.t -> int
+
 val dal_enable : Raw_context.t -> bool
 
 val zk_rollup_enable : Raw_context.t -> bool
diff --git a/src/proto_alpha/lib_protocol/raw_context.ml b/src/proto_alpha/lib_protocol/raw_context.ml
index b2dd33a6ac4de7cdea27abb08ec1878ed91be41c..cab958b3fb775e0ced6677fbb6896f18dc22dafc 100644
--- a/src/proto_alpha/lib_protocol/raw_context.ml
+++ b/src/proto_alpha/lib_protocol/raw_context.ml
@@ -1352,7 +1352,7 @@ let prepare_first_block ~level ~timestamp chain_id ctxt =
                  feature_enable;
                  incentives_enable;
                  number_of_slots;
-                 attestation_lag;
+                 attestation_lag = _;
                  attestation_threshold;
                  cryptobox_parameters;
                  minimal_participation_ratio;
@@ -1366,7 +1366,7 @@ let prepare_first_block ~level ~timestamp chain_id ctxt =
             Constants_parametric_repr.feature_enable;
             incentives_enable;
             number_of_slots;
-            attestation_lag;
+            attestation_lag = 5;
             attestation_threshold;
             cryptobox_parameters;
             minimal_participation_ratio;
diff --git a/src/proto_alpha/lib_protocol/storage.ml b/src/proto_alpha/lib_protocol/storage.ml
index cc82c9de7bd6ac74b0504dac8ece0be8fbebf9f6..18b37fe0eee0090e30fcfbd2d84348e5cdec44e1 100644
--- a/src/proto_alpha/lib_protocol/storage.ml
+++ b/src/proto_alpha/lib_protocol/storage.ml
@@ -2355,9 +2355,6 @@ module Dal = struct
           let name = ["slot_headers"]
         end)
         (struct
-          (* The size of the list below is at most equal to the
-             [number_of_slots] as declared in the DAL parameters of the
-             protocol. *)
           type t = (Dal_slot_repr.Header.t * Contract_repr.t) list
 
           let encoding =
@@ -2385,8 +2382,6 @@ module Dal = struct
           let name = ["slot_headers_successive_histories_of_level"]
         end)
         (struct
-          (* The size of the list below is always equal to the [number_of_slots]
-             as declared in the DAL parameters of the protocol. *)
           type t =
             (Dal_slot_repr.History.Pointer_hash.t * Dal_slot_repr.History.t)
             list
diff --git a/src/proto_alpha/lib_protocol/storage.mli b/src/proto_alpha/lib_protocol/storage.mli
index 67751211b736a378efdcb44b36e3bc650a322c56..95bb6114fb510c29f10ac107cd9966790bb1c4bf 100644
--- a/src/proto_alpha/lib_protocol/storage.mli
+++ b/src/proto_alpha/lib_protocol/storage.mli
@@ -1110,7 +1110,9 @@ end
 
 module Dal : sig
   module Slot : sig
-    (** This is a temporary storage for slot headers proposed onto the L1. *)
+    (** This is a temporary storage for slot headers proposed onto the L1. The
+        size of the list is at most [number_of_slots] as declared
+        in the DAL parameters of the protocol. *)
     module Headers :
       Non_iterable_indexed_data_storage
         with type t = Raw_context.t
@@ -1125,7 +1127,8 @@ module Dal : sig
 
     (** This single entry stores the cells of the DAL skip list constructed
         during the block under validation. The list is expected to have exactly
-        [number_of_slots] elements. Its cells ordering is not specified (and not
+        [number_of_slots] elements, except at the migration from T to U, where
+        it is a few times longer. Its cells ordering is not specified (and not
         relevant). A cell's binary encoding is bounded (the only part that is
         evolving in size over time is the number of backpointers, which is
         bounded by 64). *)
diff --git a/src/proto_alpha/lib_protocol/validate.ml b/src/proto_alpha/lib_protocol/validate.ml
index 557511eadf69ef82c4fd5bf265cef78ec5107ca0..9755b76507d863559627e6e846b02c124c9ec3ee 100644
--- a/src/proto_alpha/lib_protocol/validate.ml
+++ b/src/proto_alpha/lib_protocol/validate.ml
@@ -2522,8 +2522,6 @@ module Anonymous = struct
         in
         match slot_headers_opt with
         | None ->
-            (* TODO: https://gitlab.com/tezos/tezos/-/issues/7126
-               Can also fail if `attestation_lag` changes. *)
             (* It should not happen if 1) the denunciation age is correct, and 2) \
                the storage is updated correctly *)
             tzfail
@@ -2548,8 +2546,6 @@ module Anonymous = struct
                 in
                 check_consensus_operation_signature vi consensus_key attestation
             | Some (header, _publisher) ->
-                (* TODO: https://gitlab.com/tezos/tezos/-/issues/7126
-                   Can also fail if `attestation_lag` changes. *)
                 (* mismatch between published levels in \
                    storage versus in evidence; it should not happen *)
                 tzfail
diff --git a/tezt/tests/dal.ml b/tezt/tests/dal.ml
index 2508b935968be1a3c3f6161d831a437da7a5ff2b..1d32157aa8a1387acbeb5cee3e48c9991353a3a2 100644
--- a/tezt/tests/dal.ml
+++ b/tezt/tests/dal.ml
@@ -6114,7 +6114,7 @@ module Skip_list_rpcs = struct
           else if new_lag <> lag && level <= migration_level then
             Dal_RPC.Unattested
           else if level <= last_confirmed_published_level then
-            Dal_RPC.Attested lag
+            Dal_RPC.Attested new_lag
           else Dal_RPC.Unpublished
         in
         Check.(
diff --git a/tezt/tests/expected/RPC_test.ml/Alpha- (mode client) RPC regression tests- misc_protocol.out b/tezt/tests/expected/RPC_test.ml/Alpha- (mode client) RPC regression tests- misc_protocol.out
index ba976bc9301063060179243a43cd0d0410870347..e9181a3ed0413a07676e6d7590bc558fc6283848 100644
--- a/tezt/tests/expected/RPC_test.ml/Alpha- (mode client) RPC regression tests- misc_protocol.out	
+++ b/tezt/tests/expected/RPC_test.ml/Alpha- (mode client) RPC regression tests- misc_protocol.out	
@@ -40,7 +40,7 @@
   "cache_sampler_state_cycles": 5,
   "dal_parametric":
     { "feature_enable": true, "incentives_enable": true,
-      "number_of_slots": 16, "attestation_lag": 8,
+      "number_of_slots": 16, "attestation_lag": 5,
       "attestation_threshold": 66,
       "minimal_participation_ratio":
         { "numerator": "16", "denominator": "25" },
diff --git a/tezt/tests/expected/RPC_test.ml/Alpha- (mode client) RPC regression tests- misc_protocol_abaab.out b/tezt/tests/expected/RPC_test.ml/Alpha- (mode client) RPC regression tests- misc_protocol_abaab.out
index 572591a9c3805f442bc1925b60600d54eeaac392..34e7a888cc5bb4fc9fae777d9eb9d44bc95c63fc 100644
--- a/tezt/tests/expected/RPC_test.ml/Alpha- (mode client) RPC regression tests- misc_protocol_abaab.out	
+++ b/tezt/tests/expected/RPC_test.ml/Alpha- (mode client) RPC regression tests- misc_protocol_abaab.out	
@@ -40,7 +40,7 @@
   "cache_sampler_state_cycles": 5,
   "dal_parametric":
     { "feature_enable": true, "incentives_enable": true,
-      "number_of_slots": 16, "attestation_lag": 8,
+      "number_of_slots": 16, "attestation_lag": 5,
       "attestation_threshold": 66,
       "minimal_participation_ratio":
         { "numerator": "16", "denominator": "25" },
diff --git a/tezt/tests/expected/RPC_test.ml/Alpha- (mode light) RPC regression tests- misc_protocol.out b/tezt/tests/expected/RPC_test.ml/Alpha- (mode light) RPC regression tests- misc_protocol.out
index 812620064bc5ac04533d04c6c327c5f643c7f007..8fc513ca97f0579c224aa50f2d67020cb2fc6250 100644
--- a/tezt/tests/expected/RPC_test.ml/Alpha- (mode light) RPC regression tests- misc_protocol.out	
+++ b/tezt/tests/expected/RPC_test.ml/Alpha- (mode light) RPC regression tests- misc_protocol.out	
@@ -40,7 +40,7 @@
   "cache_sampler_state_cycles": 5,
   "dal_parametric":
     { "feature_enable": true, "incentives_enable": true,
-      "number_of_slots": 16, "attestation_lag": 8,
+      "number_of_slots": 16, "attestation_lag": 5,
       "attestation_threshold": 66,
       "minimal_participation_ratio":
         { "numerator": "16", "denominator": "25" },
diff --git a/tezt/tests/expected/RPC_test.ml/Alpha- (mode light) RPC regression tests- misc_protocol_abaab.out b/tezt/tests/expected/RPC_test.ml/Alpha- (mode light) RPC regression tests- misc_protocol_abaab.out
index 481ea94d8d3112838a7dcca32c67add8ca041924..39d9c90c3d3a9ea7b268bc5b5e8b9b8ccd172df8 100644
--- a/tezt/tests/expected/RPC_test.ml/Alpha- (mode light) RPC regression tests- misc_protocol_abaab.out	
+++ b/tezt/tests/expected/RPC_test.ml/Alpha- (mode light) RPC regression tests- misc_protocol_abaab.out	
@@ -40,7 +40,7 @@
   "cache_sampler_state_cycles": 5,
   "dal_parametric":
     { "feature_enable": true, "incentives_enable": true,
-      "number_of_slots": 16, "attestation_lag": 8,
+      "number_of_slots": 16, "attestation_lag": 5,
       "attestation_threshold": 66,
       "minimal_participation_ratio":
         { "numerator": "16", "denominator": "25" },
diff --git a/tezt/tests/expected/RPC_test.ml/Alpha- (mode proxy) RPC regression tests- misc_protocol.out b/tezt/tests/expected/RPC_test.ml/Alpha- (mode proxy) RPC regression tests- misc_protocol.out
index 4d1770a65aafa44d3822ffc181a7a4e8b2ca3fdb..718cfdbf436e441abe32ea3dfe6ce09829dc6fc8 100644
--- a/tezt/tests/expected/RPC_test.ml/Alpha- (mode proxy) RPC regression tests- misc_protocol.out	
+++ b/tezt/tests/expected/RPC_test.ml/Alpha- (mode proxy) RPC regression tests- misc_protocol.out	
@@ -40,7 +40,7 @@
   "cache_sampler_state_cycles": 5,
   "dal_parametric":
     { "feature_enable": true, "incentives_enable": true,
-      "number_of_slots": 16, "attestation_lag": 8,
+      "number_of_slots": 16, "attestation_lag": 5,
       "attestation_threshold": 66,
       "minimal_participation_ratio":
         { "numerator": "16", "denominator": "25" },
diff --git a/tezt/tests/expected/RPC_test.ml/Alpha- (mode proxy) RPC regression tests- misc_protocol_abaab.out b/tezt/tests/expected/RPC_test.ml/Alpha- (mode proxy) RPC regression tests- misc_protocol_abaab.out
index 36ad49469a202cae6f5c878062dc1b63b6249015..cf92eda46073a99e10412ac6ca89069c8dba4558 100644
--- a/tezt/tests/expected/RPC_test.ml/Alpha- (mode proxy) RPC regression tests- misc_protocol_abaab.out	
+++ b/tezt/tests/expected/RPC_test.ml/Alpha- (mode proxy) RPC regression tests- misc_protocol_abaab.out	
@@ -40,7 +40,7 @@
   "cache_sampler_state_cycles": 5,
   "dal_parametric":
     { "feature_enable": true, "incentives_enable": true,
-      "number_of_slots": 16, "attestation_lag": 8,
+      "number_of_slots": 16, "attestation_lag": 5,
       "attestation_threshold": 66,
       "minimal_participation_ratio":
         { "numerator": "16", "denominator": "25" },
diff --git a/tezt/tests/expected/dal.ml/Alpha- Testing DAL node (attesters receive DAL rewards).out b/tezt/tests/expected/dal.ml/Alpha- Testing DAL node (attesters receive DAL rewards).out
index 75913d02c84d30fcca2707b218aeff8afef2bd4b..df177ef5258003514eb5727312dd3b7b64bc3d89 100644
--- a/tezt/tests/expected/dal.ml/Alpha- Testing DAL node (attesters receive DAL rewards).out	
+++ b/tezt/tests/expected/dal.ml/Alpha- Testing DAL node (attesters receive DAL rewards).out	
@@ -138,9 +138,9 @@ GET http://[HOST]:[PORT]/chains/main/blocks/head/context/issuance/expected_issua
 
 GET http://[HOST]:[PORT]/chains/main/blocks/head~1/context/delegates/[PUBLIC_KEY_HASH]/dal_participation
 200 OK
-{"expected_assigned_shards_per_slot":409,"delegate_attested_dal_slots":0,"delegate_attestable_dal_slots":6,"expected_dal_rewards":"212680","sufficient_dal_participation":false,"denounced":false}
+{"expected_assigned_shards_per_slot":409,"delegate_attested_dal_slots":0,"delegate_attestable_dal_slots":5,"expected_dal_rewards":"212680","sufficient_dal_participation":false,"denounced":false}
 
 GET http://[HOST]:[PORT]/chains/main/blocks/head~1/context/delegates/[PUBLIC_KEY_HASH]/dal_participation
 200 OK
-{"expected_assigned_shards_per_slot":409,"delegate_attested_dal_slots":6,"delegate_attestable_dal_slots":6,"expected_dal_rewards":"212680","sufficient_dal_participation":true,"denounced":false}
+{"expected_assigned_shards_per_slot":409,"delegate_attested_dal_slots":5,"delegate_attestable_dal_slots":5,"expected_dal_rewards":"212680","sufficient_dal_participation":true,"denounced":false}
 
diff --git a/tezt/tests/expected/dal.ml/Alpha- Testing DAL rollup and node with L1 (rollup_node_applies_dal_pages).out b/tezt/tests/expected/dal.ml/Alpha- Testing DAL rollup and node with L1 (rollup_node_applies_dal_pages).out
index c9f493392e66b3df335d199ef345116fcd87f7b1..2d1ef00e164efb6393090b9945411957588920f3 100644
--- a/tezt/tests/expected/dal.ml/Alpha- Testing DAL rollup and node with L1 (rollup_node_applies_dal_pages).out	
+++ b/tezt/tests/expected/dal.ml/Alpha- Testing DAL rollup and node with L1 (rollup_node_applies_dal_pages).out	
@@ -38,7 +38,7 @@ Smart rollup [SMART_ROLLUP_HASH] memorized as "rollup"
 { "level": 2,
   "commitment_hash": "[SC_ROLLUP_COMMITMENT_HASH]" }
 
-./octez-client --wait none send smart rollup message '["dal:16:8:32:0:2:4:6"]' from bootstrap2
+./octez-client --wait none send smart rollup message '["dal:16:5:32:0:2:4:6"]' from bootstrap2
 Node is bootstrapped.
 Estimated gas: 170.903 units (will add 100 for safety)
 Estimated storage: no bytes added
diff --git a/tezt/tests/expected/operation_size_and_gas.ml/Alpha- operation size and gas for SC rollup refutation operation.out b/tezt/tests/expected/operation_size_and_gas.ml/Alpha- operation size and gas for SC rollup refutation operation.out
index 3a16dde7ba840c7906fcec3f2fbcd4164305d9f0..c07e9f8f76c8088c1d91547ee85366bbe7f0224a 100644
--- a/tezt/tests/expected/operation_size_and_gas.ml/Alpha- operation size and gas for SC rollup refutation operation.out	
+++ b/tezt/tests/expected/operation_size_and_gas.ml/Alpha- operation size and gas for SC rollup refutation operation.out	
@@ -70,4 +70,4 @@ This sequence of operations was run:
         [PUBLIC_KEY_HASH] ...................................................... -ꜩ10000
         Frozen_bonds([PUBLIC_KEY_HASH],[SMART_ROLLUP_HASH]) ... +ꜩ10000
 
-smart_rollup_refute, 231, 5149.841000
+smart_rollup_refute, 231, 5149.845000
diff --git a/tezt/tests/expected/sc_rollup.ml/Alpha- arith - participant of a refutation game are slashed-rewarded.out b/tezt/tests/expected/sc_rollup.ml/Alpha- arith - participant of a refutation game are slashed-rewarded.out
index dd1dc9010ea43fd66d595a85e74b29844218cf86..3cc512307a17e596ab3e5b2d34b0a6e611d78265 100644
--- a/tezt/tests/expected/sc_rollup.ml/Alpha- arith - participant of a refutation game are slashed-rewarded.out	
+++ b/tezt/tests/expected/sc_rollup.ml/Alpha- arith - participant of a refutation game are slashed-rewarded.out	
@@ -108,7 +108,7 @@ This sequence of operations was run:
 
 ./octez-client --wait none timeout dispute on smart rollup '[SMART_ROLLUP_HASH]' with '[PUBLIC_KEY_HASH]' against '[PUBLIC_KEY_HASH]' from bootstrap1
 Node is bootstrapped.
-Estimated gas: 3715.433 units (will add 100 for safety)
+Estimated gas: 3715.627 units (will add 100 for safety)
 Estimated storage: no bytes added
 Operation successfully injected in the node.
 Operation hash is '[OPERATION_HASH]'
@@ -131,7 +131,7 @@ This sequence of operations was run:
       First staker (Alice): [PUBLIC_KEY_HASH]
       Second staker (Bob): [PUBLIC_KEY_HASH]
       This smart rollup refutation timeout was successfully applied
-      Consumed gas: 3715.367
+      Consumed gas: 3715.561
       Refutation game status: Game ended: [PUBLIC_KEY_HASH] lost because: timeout
       Balance updates:
         Frozen_bonds([PUBLIC_KEY_HASH],[SMART_ROLLUP_HASH]) ... -ꜩ10000
diff --git a/tezt/tests/expected/weeklynet.ml/Alpha- weeklynet regression test.out b/tezt/tests/expected/weeklynet.ml/Alpha- weeklynet regression test.out
index cfa61ab0f80acdad845a34a15f5601a63685ed7a..c91bd5225fa41c5c8605aef436098c49dd7d7dc0 100644
--- a/tezt/tests/expected/weeklynet.ml/Alpha- weeklynet regression test.out	
+++ b/tezt/tests/expected/weeklynet.ml/Alpha- weeklynet regression test.out	
@@ -30,7 +30,7 @@
   "cache_sampler_state_cycles": 5,
   "dal_parametric":
     { "feature_enable": true, "incentives_enable": false,
-      "number_of_slots": 32, "attestation_lag": 8,
+      "number_of_slots": 32, "attestation_lag": 5,
       "attestation_threshold": 66,
       "minimal_participation_ratio":
         { "numerator": "16", "denominator": "25" },