diff --git a/src/main/java/eu/dnetlib/repo/manager/service/RepositoryServiceImpl.java b/src/main/java/eu/dnetlib/repo/manager/service/RepositoryServiceImpl.java
index b89746a..898bbb1 100644
--- a/src/main/java/eu/dnetlib/repo/manager/service/RepositoryServiceImpl.java
+++ b/src/main/java/eu/dnetlib/repo/manager/service/RepositoryServiceImpl.java
@@ -614,7 +614,7 @@ public class RepositoryServiceImpl implements RepositoryService {
         emailUtils.sendAdminRegisterInterfaceEmail(e, comment, repositoryInterface, authentication);
         emailUtils.sendUserRegisterInterfaceEmail(e, comment, repositoryInterface, authentication);
 
-        if (desiredCompatibilityLevel != null && !repositoryInterface.getCompatibility().equals(desiredCompatibilityLevel)) {
+        if (desiredCompatibilityLevel != null && (repositoryInterface.getCompatibility() == null || !repositoryInterface.getCompatibility().equals(desiredCompatibilityLevel))) {
             InterfaceComplianceRequest request = new InterfaceComplianceRequest(repoId, repositoryInterface.getId(), desiredCompatibilityLevel);
             interfaceComplianceService.create(request);
         }
@@ -637,7 +637,7 @@ public class RepositoryServiceImpl implements RepositoryService {
         emailUtils.sendAdminUpdateInterfaceEmail(repository, comment, repositoryInterface, authentication);
         emailUtils.sendUserUpdateInterfaceEmail(repository, comment, repositoryInterface, authentication);
 
-        if (desiredCompatibilityLevel != null && !repositoryInterface.getCompatibility().equals(desiredCompatibilityLevel)) {
+        if (desiredCompatibilityLevel != null && (repositoryInterface.getCompatibility() == null || !repositoryInterface.getCompatibility().equals(desiredCompatibilityLevel))) {
             InterfaceComplianceRequest request = new InterfaceComplianceRequest(repoId, repositoryInterface.getId(), desiredCompatibilityLevel);
             interfaceComplianceService.create(request);
         }