LDAP group is stored multiple times in Keycloak DB

1. Provide Active Directory Server which has the following user and group entry: dn: CN=testuser1,OU=users,OU=test,DC=example,DC=com dn: CN=testgroup1,OU=groups,OU=test,DC=example,DC=com 2. Add the testuser1 as a member to the testgroup1, then the testgroup1 should be : dn: CN=testgroup1,OU=groups,OU=test,DC=example,DC=com member: CN=testuser1,OU=users,OU=test,DC=example,DC=com 3. start Keycloak 4. Import the attached realm_testLdapGroup.json to create the test realm, and change the IP address and bind DN/password for you AD server 5. Add the following filter in "LDAP Filter" in User Federation > Ldap > LDAP Mappers > GroupMapper, then click "Save" button (cn=nosuchgroup) 6. Click "Synchronize all users" in User Federation > Ldap 7. Clear the "LDAP Filter" in User Federation > Ldap > LDAP Mappers > GroupMapper, then click "Save" button 8. Click Manage > Users, then "View all users", and click "Edit" button of "testuser1" 9. Click the "Groups" tab of the testuser1 10. Click Manage > Groups, then you will see the testgroup1 duplicated