diff --git a/Detector/UT/include/Detector/UT/DeUTSensor.h b/Detector/UT/include/Detector/UT/DeUTSensor.h
index 3cece986b7468bf9210af5cc6f85072adadad73c..c270a565c513a00bca8afff6227dde4fbef640aa 100644
--- a/Detector/UT/include/Detector/UT/DeUTSensor.h
+++ b/Detector/UT/include/Detector/UT/DeUTSensor.h
@@ -97,6 +97,12 @@ namespace LHCb::Detector::UT {
       return ( strip >= firstStrip() ) && strip < nStrip() + firstStrip();
     }
     LineTraj<double> trajectory( unsigned int strip, double offset ) const {
+      if ( dd4hep::_toInt( "WithCorrectedP0Parameter" ) && !isStrip( strip ) ) {
+        throw std::out_of_range(
+            fmt::format( "DeUTSector::createTraj: strip out of range, given {strip}, expect [{first}, {last}]",
+                         fmt::arg( "strip", strip ), fmt::arg( "first", firstStrip() ),
+                         fmt::arg( "last", firstStrip() + nStrip() - 1 ) ) );
+      }
       const double arclen =
           ( ( xInverted() && getStripflip() ) ? ( nStrip() - offset - strip - ( firstStrip() + 1 ) % 2 )
                                               : ( offset + strip - firstStrip() ) ) *
diff --git a/Detector/UT/src/DeUT.cpp b/Detector/UT/src/DeUT.cpp
index d9b1d77ed1f207f4386bf6ed4f151b99e9d306c1..324019272f7281dc74d549e2026bd1dcbc899f20 100644
--- a/Detector/UT/src/DeUT.cpp
+++ b/Detector/UT/src/DeUT.cpp
@@ -236,10 +236,18 @@ LHCb::Detector::UT::detail::DeUTSectorObject::DeUTSectorObject( const dd4hep::De
 
   { // cacheInfo
     auto thisSector = DeUTSector{this};
-    auto firstTraj  = thisSector.createTraj( thisSector.firstStrip(), 0 );
-    // if ( m_stripflip && xInverted() ) firstTraj = createTraj( m_nStrip, 0 );
-    if ( thisSector.stripflip() && thisSector.xInverted() )
-      firstTraj = thisSector.createTraj( thisSector.nStrip() + thisSector.firstStrip(), 0 );
+    auto firstTraj  = thisSector.trajectoryFirstStrip();
+    if ( thisSector.stripflip() && thisSector.xInverted() ) {
+      if ( dd4hep::_toInt( "WithCorrectedP0Parameter" ) ) {
+        // use CORRECT p0 parameter since 2025 data taking (>2024-v00.00)
+        dd4hep::printout( dd4hep::DEBUG, "UT::cacheInfo", "With correct p0 parameter" );
+        firstTraj = thisSector.trajectoryLastStrip();
+      } else {
+        // use WRONG p0 parameter before 2025 data taking (<=2024-v00.00)
+        dd4hep::printout( dd4hep::DEBUG, "UT::cacheInfo", "With wrong p0 parameter" );
+        firstTraj = thisSector.createTraj( thisSector.nStrip() + thisSector.firstStrip(), 0 );
+      }
+    }
 
     // get the start and end point. for piecewise trajectories, we
     // effectively make an approximation by a straight line.
diff --git a/compact/components/UT/2024-v00.00/parameters.xml b/compact/components/UT/2024-v00.00/parameters.xml
index 3c30e6ccb341be203ac604b1598677059f7e41bf..975c1670eb3c4f960285be6466bf360b3c9de27e 100644
--- a/compact/components/UT/2024-v00.00/parameters.xml
+++ b/compact/components/UT/2024-v00.00/parameters.xml
@@ -17,6 +17,10 @@
 		<!-- *  Author: Jianchun Wang  * -->
 		<constant name="UTGeomVersion" value="1.1" />
 		<constant name="UTEpsilon" value="0.001*mm" />
+		<!-- WithCorrectedP0Parameter can only be 0 or 1 -->
+		<!-- 0: for data collected in 2024 -->
+		<!-- 1: for data collected after 2024 -->
+		<constant name="WithCorrectedP0Parameter" value="0" />
 		<!-- ========== UT sensors ========== -->
     <constant name="UTSensorAPitch" value="0.1875*mm" />
     <constant name="UTSensorBCDPitch" value="0.0935*mm" />
diff --git a/compact/components/UT/trunk/parameters.xml b/compact/components/UT/trunk/parameters.xml
index ec30eddb29d86aaccd0e0cd0fd42e3521c881152..7d976324fd96db7a689a39a07745ce2c1162f424 100644
--- a/compact/components/UT/trunk/parameters.xml
+++ b/compact/components/UT/trunk/parameters.xml
@@ -17,6 +17,10 @@
 		<!-- *  Author: Jianchun Wang  * -->
 		<constant name="UTGeomVersion" value="1.1" />
 		<constant name="UTEpsilon" value="0.001*mm" />
+		<!-- WithCorrectedP0Parameter can only be 0 or 1 -->
+		<!-- 0: for data collected in 2024 -->
+		<!-- 1: for data collected after 2024 -->
+		<constant name="WithCorrectedP0Parameter" value="1" />
 		<!-- ========== UT sensors ========== -->
     <constant name="UTSensorAPitch" value="0.1875*mm" />
     <constant name="UTSensorBCDPitch" value="0.0935*mm" />