diff --git a/src/main/java/org/gridsuite/study/server/networkmodificationtree/entities/RootNetworkNodeInfoEntity.java b/src/main/java/org/gridsuite/study/server/networkmodificationtree/entities/RootNetworkNodeInfoEntity.java
index 3ff2076e4..7863e6d12 100644
--- a/src/main/java/org/gridsuite/study/server/networkmodificationtree/entities/RootNetworkNodeInfoEntity.java
+++ b/src/main/java/org/gridsuite/study/server/networkmodificationtree/entities/RootNetworkNodeInfoEntity.java
@@ -43,7 +43,7 @@ public class RootNetworkNodeInfoEntity {
 
     @ManyToOne(fetch = FetchType.LAZY)
     @JoinColumn(name = "nodeInfoId",
-        referencedColumnName = "idNode",
+        referencedColumnName = "idNode", nullable = false,
         foreignKey = @ForeignKey(name = "rootNetworkNode_node_id_fk_constraint"))
     private NetworkModificationNodeInfoEntity nodeInfo;
 
diff --git a/src/main/resources/db/changelog/changesets/changelog_20241031T150610Z.xml b/src/main/resources/db/changelog/changesets/changelog_20241031T150610Z.xml
index 7fd253224..af2dd321f 100644
--- a/src/main/resources/db/changelog/changesets/changelog_20241031T150610Z.xml
+++ b/src/main/resources/db/changelog/changesets/changelog_20241031T150610Z.xml
@@ -32,6 +32,8 @@
                                  validate="true"/>
         <addNotNullConstraint columnDataType="uuid" tableName="root_network_node_info" columnName="root_network_id"
                               validate="true"/>
+        <addNotNullConstraint columnDataType="uuid" tableName="root_network_node_info" columnName="node_info_id"
+                              validate="true"/>
     </changeSet>
     <changeSet author="amarsli (generated)" id="1730387191936-5">
         <dropForeignKeyConstraint baseTableName="root_network_node_info" constraintName="FK40i207mmx5ep57g7xnrv16t0a"/>
diff --git a/src/test/java/org/gridsuite/study/server/SensitivityAnalysisTest.java b/src/test/java/org/gridsuite/study/server/SensitivityAnalysisTest.java
index 430f3025a..ce3428890 100644
--- a/src/test/java/org/gridsuite/study/server/SensitivityAnalysisTest.java
+++ b/src/test/java/org/gridsuite/study/server/SensitivityAnalysisTest.java
@@ -605,8 +605,7 @@ void testSensitivityAnalysisParameters() throws Exception {
             .willReturn(WireMock.ok().withHeader(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE).withBody(objectMapper.writeValueAsString(SENSITIVITY_ANALYSIS_PARAMETERS_UUID))));
         // end mocking
 
-        StudyEntity studyEntity = insertDummyStudy(UUID.randomUUID(), UUID.randomUUID());
-        UUID studyNameUserIdUuid = studyEntity.getId();
+        UUID studyNameUserIdUuid = insertDummyStudy(UUID.randomUUID(), UUID.randomUUID()).getId();
         assertNotNull(studyNameUserIdUuid);
 
         // Get sensitivity analysis parameters (on existing)
@@ -622,8 +621,9 @@ void testSensitivityAnalysisParameters() throws Exception {
         wireMock.verify(WireMock.putRequestedFor(WireMock.urlPathEqualTo("/v1/parameters/" + SENSITIVITY_ANALYSIS_PARAMETERS_UUID)));
 
         // Get sensitivity analysis (not existing, so it will create default)
-        studyEntity.setSensitivityAnalysisParametersUuid(null);
-        studyRepository.save(studyEntity);
+        StudyEntity studyEntityToUpdate = studyRepository.findById(studyNameUserIdUuid).orElseThrow(() -> new StudyException(StudyException.Type.STUDY_NOT_FOUND));
+        studyEntityToUpdate.setSensitivityAnalysisParametersUuid(null);
+        studyRepository.save(studyEntityToUpdate);
 
         mockMvc.perform(get("/v1/studies/{studyUuid}/sensitivity-analysis/parameters", studyNameUserIdUuid)).andExpectAll(
             status().isOk(),
@@ -634,8 +634,8 @@ void testSensitivityAnalysisParameters() throws Exception {
         assertEquals(SENSITIVITY_ANALYSIS_PARAMETERS_UUID, studyRepository.findById(studyNameUserIdUuid).orElseThrow().getSensitivityAnalysisParametersUuid());
 
         // Set sensitivity analysis parameters (will create)
-        studyEntity.setSensitivityAnalysisParametersUuid(null);
-        studyRepository.save(studyEntity);
+        studyEntityToUpdate.setSensitivityAnalysisParametersUuid(null);
+        studyRepository.save(studyEntityToUpdate);
 
         setParametersAndDoChecks(studyNameUserIdUuid, SENSITIVITY_ANALYSIS_UPDATED_PARAMETERS_JSON);
 
diff --git a/src/test/java/org/gridsuite/study/server/utils/TestUtils.java b/src/test/java/org/gridsuite/study/server/utils/TestUtils.java
index c959b78e8..6c9017b12 100644
--- a/src/test/java/org/gridsuite/study/server/utils/TestUtils.java
+++ b/src/test/java/org/gridsuite/study/server/utils/TestUtils.java
@@ -17,8 +17,6 @@
 import org.gridsuite.study.server.networkmodificationtree.dto.BuildStatus;
 import org.gridsuite.study.server.networkmodificationtree.dto.NetworkModificationNode;
 import org.gridsuite.study.server.networkmodificationtree.dto.NodeBuildStatus;
-import org.gridsuite.study.server.networkmodificationtree.entities.NodeBuildStatusEmbeddable;
-import org.gridsuite.study.server.networkmodificationtree.entities.RootNetworkNodeInfoEntity;
 import org.gridsuite.study.server.repository.StudyEntity;
 import org.gridsuite.study.server.repository.rootnetwork.RootNetworkEntity;
 import org.gridsuite.study.server.repository.nonevacuatedenergy.NonEvacuatedEnergyParametersEntity;
@@ -120,9 +118,8 @@ public static StudyEntity createDummyStudy(UUID networkUuid, String networkId, U
                 .sensitivityAnalysisParametersUuid(sensitivityParametersUuid)
                 .nonEvacuatedEnergyParameters(nonEvacuatedEnergyParametersEntity)
                 .build();
-        RootNetworkEntity test = RootNetworkEntity.builder().caseFormat(caseFormat).caseUuid(caseUuid).caseName(caseName).networkId(networkId).networkUuid(networkUuid).reportUuid(reportUuid).build();
-        test.addRootNetworkNodeInfo(RootNetworkNodeInfoEntity.builder().nodeBuildStatus(NodeBuildStatusEmbeddable.from(BuildStatus.NOT_BUILT)).build());
-        studyEntity.addRootNetwork(test);
+        RootNetworkEntity rootNetworkEntity = RootNetworkEntity.builder().caseFormat(caseFormat).caseUuid(caseUuid).caseName(caseName).networkId(networkId).networkUuid(networkUuid).reportUuid(reportUuid).build();
+        studyEntity.addRootNetwork(rootNetworkEntity);
         return studyEntity;
     }