diff --git a/src/main/java/org/gridsuite/modification/server/dto/formula/equipmentfield/TwoWindingsTransformerField.java b/src/main/java/org/gridsuite/modification/server/dto/formula/equipmentfield/TwoWindingsTransformerField.java
index 6a13e93d6..8e5382c13 100644
--- a/src/main/java/org/gridsuite/modification/server/dto/formula/equipmentfield/TwoWindingsTransformerField.java
+++ b/src/main/java/org/gridsuite/modification/server/dto/formula/equipmentfield/TwoWindingsTransformerField.java
@@ -69,14 +69,14 @@ public static void setNewValue(TwoWindingsTransformer transformer, String twoWin
                     null, new AttributeModification<>(newValue.intValue(), OperationType.SET), null, null);
             case RATIO_TARGET_DEADBAND -> modifyTargets(ratioTapChanger, null, true, null, attributeModification, null);
             case REGULATION_VALUE -> processPhaseTapRegulation(
-                    phaseTapChanger, null, regulationMode, true, attributeModification, null, null
+                    phaseTapChanger, null, regulationMode, true, attributeModification, null, null, null
             );
             case PHASE_LOW_TAP_POSITION -> processTapChangerPositionsAndSteps(phaseTapChanger, null, true,
                     new AttributeModification<>(newValue.intValue(), OperationType.SET), null, null, null);
             case PHASE_TAP_POSITION -> processTapChangerPositionsAndSteps(phaseTapChanger, null, true,
                     null, new AttributeModification<>(newValue.intValue(), OperationType.SET), null, null);
             case PHASE_TARGET_DEADBAND -> processPhaseTapRegulation(
-                    phaseTapChanger, null, null, true, null, attributeModification, null
+                    phaseTapChanger, null, null, true, null, attributeModification, null, null
             );
         }
     }
diff --git a/src/main/java/org/gridsuite/modification/server/modifications/TwoWindingsTransformerModification.java b/src/main/java/org/gridsuite/modification/server/modifications/TwoWindingsTransformerModification.java
index 3676e0b01..a3ab93d51 100644
--- a/src/main/java/org/gridsuite/modification/server/modifications/TwoWindingsTransformerModification.java
+++ b/src/main/java/org/gridsuite/modification/server/modifications/TwoWindingsTransformerModification.java
@@ -215,8 +215,9 @@ private void processPhaseTapChanger(Network network,
             regulationMode = phaseTapChangerInfos.getRegulationMode().getValue();
         }
         if (!PhaseTapChanger.RegulationMode.FIXED_TAP.equals(regulationMode)) {
-            processPhaseTapRegulation(phaseTapChanger, phaseTapChangerAdder, regulationMode, isModification, phaseTapChangerInfos.getRegulationValue(), phaseTapChangerInfos.getTargetDeadband(), regulationReports
-            );
+            processPhaseTapRegulation(phaseTapChanger, phaseTapChangerAdder, regulationMode, isModification,
+                phaseTapChangerInfos.getRegulationValue(), phaseTapChangerInfos.getTargetDeadband(),
+                phaseTapChangerInfos.getRegulating(), regulationReports);
         }
 
         processRegulatingTerminal(phaseTapChangerInfos, phaseTapChanger, phaseTapChangerAdder, regulationReports,
@@ -254,6 +255,7 @@ public static void processPhaseTapRegulation(PhaseTapChanger phaseTapChanger,
                                                  boolean isModification,
                                                  AttributeModification<Double> modifyRegulationValue,
                                                  AttributeModification<Double> modifyTargetDeadband,
+                                                 AttributeModification<Boolean> regulating,
                                                  List<ReportNode> regulationReports) {
 
         if (regulationMode != null) {
@@ -284,8 +286,8 @@ public static void processPhaseTapRegulation(PhaseTapChanger phaseTapChanger,
             isModification ? phaseTapChanger::setRegulating
                 : phaseTapChangerAdder::setRegulating,
             isModification ? phaseTapChanger::isRegulating : () -> null,
-            phaseTapChangerInfos.getRegulating(), "Regulating", 2);
-        if (regulatingReport != null) {
+            regulating, "Regulating", 2);
+        if (regulationReports != null && regulatingReport != null) {
             regulationReports.add(regulatingReport);
         }
     }