diff --git a/app/models/vulnerability.rb b/app/models/vulnerability.rb
index a9e1b2dbc5b34ef4374dca39e8ad8863a4feb8ce..702e7fce567e7fb0fd99e4d847da65ff409b5a0c 100644
--- a/app/models/vulnerability.rb
+++ b/app/models/vulnerability.rb
@@ -5,7 +5,9 @@ class Vulnerability < ApplicationRecord
   include EachBatch
   include IgnorableColumns
 
-  ignore_column %i[epic_id milestone_id last_edited_at], remove_with: '16.9', remove_after: '2023-01-13'
+  ignore_column %i[epic_id milestone_id last_edited_at start_date],
+    remove_with: '16.9',
+    remove_after: '2024-01-13'
 
   alias_attribute :vulnerability_id, :id
 
diff --git a/doc/api/project_vulnerabilities.md b/doc/api/project_vulnerabilities.md
index 1fbea66de7f2496e94d1a2f32352f6fdaf0a829f..c15a74522195a3db215066753d1419937898e71a 100644
--- a/doc/api/project_vulnerabilities.md
+++ b/doc/api/project_vulnerabilities.md
@@ -9,6 +9,7 @@ type: reference, api
 
 > - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/10242) in GitLab 12.6.
 > - `last_edited_at` [deprecated](https://gitlab.com/gitlab-org/gitlab/-/issues/268154) in GitLab 16.7.
+> - `start_date` [deprecated](https://gitlab.com/gitlab-org/gitlab/-/issues/268154) in GitLab 16.7.
 
 WARNING:
 This API is in the process of being deprecated and considered unstable.
@@ -96,7 +97,6 @@ Example response:
         "resolved_by_id": null,
         "resolved_on_default_branch": false,
         "severity": "low",
-        "start_date": null,
         "state": "detected",
         "title": "Regular Expression Denial of Service in debug",
         "updated_at": "2020-04-07T14:01:04.655Z",
@@ -183,7 +183,6 @@ Example response:
     "resolved_by_id": null,
     "resolved_on_default_branch": false,
     "severity": "low",
-    "start_date": null,
     "state": "detected",
     "title": "Regular Expression Denial of Service in debug",
     "updated_at": "2020-04-07T14:01:04.655Z",
diff --git a/doc/api/vulnerabilities.md b/doc/api/vulnerabilities.md
index ff45c5d6cfa85ee7960244af81e1a290cec06f20..bddedb05c2c64243515ef384eed348b756e80967 100644
--- a/doc/api/vulnerabilities.md
+++ b/doc/api/vulnerabilities.md
@@ -8,6 +8,7 @@ info: To determine the technical writer assigned to the Stage/Group associated w
 
 > - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/10242) in GitLab 12.6.
 > - `last_edited_at` [deprecated](https://gitlab.com/gitlab-org/gitlab/-/issues/268154) in GitLab 16.7.
+> - `start_date` [deprecated](https://gitlab.com/gitlab-org/gitlab/-/issues/268154) in GitLab 16.7.
 
 NOTE:
 The former Vulnerabilities API was renamed to Vulnerability Findings API
@@ -64,7 +65,6 @@ Example response:
   "updated_by_id": null,
   "last_edited_by_id": null,
   "closed_by_id": null,
-  "start_date": null,
   "due_date": null,
   "created_at": "2019-10-13T15:08:40.219Z",
   "updated_at": "2019-10-13T15:09:40.382Z",
@@ -113,7 +113,6 @@ Example response:
   "updated_by_id": null,
   "last_edited_by_id": null,
   "closed_by_id": null,
-  "start_date": null,
   "due_date": null,
   "created_at": "2019-10-13T15:08:40.219Z",
   "updated_at": "2019-10-13T15:09:40.382Z",
@@ -162,7 +161,6 @@ Example response:
   "updated_by_id": null,
   "last_edited_by_id": null,
   "closed_by_id": null,
-  "start_date": null,
   "due_date": null,
   "created_at": "2019-10-13T15:08:40.219Z",
   "updated_at": "2019-10-13T15:09:40.382Z",
@@ -211,7 +209,6 @@ Example response:
   "updated_by_id": null,
   "last_edited_by_id": null,
   "closed_by_id": null,
-  "start_date": null,
   "due_date": null,
   "created_at": "2019-10-13T15:08:40.219Z",
   "updated_at": "2019-10-13T15:09:40.382Z",
@@ -260,7 +257,6 @@ Example response:
   "updated_by_id": null,
   "last_edited_by_id": null,
   "closed_by_id": null,
-  "start_date": null,
   "due_date": null,
   "created_at": "2019-10-13T15:08:40.219Z",
   "updated_at": "2019-10-13T15:09:40.382Z",
diff --git a/ee/lib/ee/api/entities/vulnerability.rb b/ee/lib/ee/api/entities/vulnerability.rb
index c0571bb4bd1b166b0bb690999ea13b9bb9797d14..313d402ce09db33441812941795d799ae4894bb5 100644
--- a/ee/lib/ee/api/entities/vulnerability.rb
+++ b/ee/lib/ee/api/entities/vulnerability.rb
@@ -26,7 +26,6 @@ class Vulnerability < Grape::Entity
         expose :dismissed_by_id
         expose :confirmed_by_id
 
-        expose :start_date
         expose :due_date
 
         expose :created_at
@@ -35,9 +34,10 @@ class Vulnerability < Grape::Entity
         expose :dismissed_at
         expose :confirmed_at
 
-        # This field is deprecated and always returns nil
+        # These fields are deprecated and always returns nil
         # TODO remove with https://gitlab.com/gitlab-org/gitlab/-/work_items/431990
         expose(:last_edited_at) { |_settings, _options| nil }
+        expose(:start_date) { |_settings, _options| nil }
       end
     end
   end
diff --git a/ee/spec/lib/ee/api/entities/vulnerability_spec.rb b/ee/spec/lib/ee/api/entities/vulnerability_spec.rb
index e96cdbeee4ad6487d2658e93f808968d2a0714ad..c11623ba2da52cfcc9222a185897a2c48618e412 100644
--- a/ee/spec/lib/ee/api/entities/vulnerability_spec.rb
+++ b/ee/spec/lib/ee/api/entities/vulnerability_spec.rb
@@ -36,7 +36,6 @@
     expect(subject[:dismissed_by_id]).to eq(vulnerability.dismissed_by_id)
     expect(subject[:confirmed_by_id]).to eq(vulnerability.confirmed_by_id)
 
-    expect(subject[:start_date]).to eq(vulnerability.start_date)
     expect(subject[:due_date]).to eq(vulnerability.due_date)
 
     expect(subject[:created_at]).to eq(vulnerability.created_at)