LDAP user with changed email address

Hi,

I faced a problem: The email address of a LDAP-enabled user (ActiveDirectory, if this matters) changes in LDAP. Effect: Gitlab creates a new user. If the old username was jdoe, the new becomes jdoe1, and jdoe gets redirected to jdoe1 after logging in. The email address cannot be changed in the Admin's Interface - the change won't be saved. I ended up in manipulating the database (users.email)

Rainer

Gitlab CE 11.2.3