diff --git a/dmp-backend/web/src/main/java/eu/eudat/logic/managers/MergeEmailConfirmationManager.java b/dmp-backend/web/src/main/java/eu/eudat/logic/managers/MergeEmailConfirmationManager.java
index 9b67a9ff8..562880542 100644
--- a/dmp-backend/web/src/main/java/eu/eudat/logic/managers/MergeEmailConfirmationManager.java
+++ b/dmp-backend/web/src/main/java/eu/eudat/logic/managers/MergeEmailConfirmationManager.java
@@ -91,6 +91,12 @@ public class MergeEmailConfirmationManager {
 		});
 		oldUser.setUserStatus((short)1);
 		oldUser.setEmail(null);
+		List<Credential> credentials = databaseRepository.getCredentialDao().asQueryable().where((builder, root) -> builder.equal(root.get("userInfo"), oldUser)).toList();
+		credentials.forEach(cred -> {
+			if (cred.getId() != credential.getId()) {
+				databaseRepository.getCredentialDao().delete(cred);
+			}
+		});
 		databaseRepository.getUserInfoDao().createOrUpdate(oldUser);
 	}