User admin lost replicate permission after AEM 6 upgrade

After updating my instance CQ5.6, I noticed that my user admin cannot Delete, Activate, Deactivate users or groups. Also, he has lost his replicate configuration. If I check a replication permission, save and refresh, nothing is saved. 

Also, the administrators group (who belongs to user-administrators and everyone groups) didn't have the replicate permissions activated. So, after activating them and displaying admin permissions, in the Replicate column there is an "*!" and it says :

"Nonefective

admin (allow)

administrators (allow)"

Everytime I open /useradmin, the error.log says:

28.04.2015 16:30:14.306 *WARN* [216.46.22.130 [1430253014295] GET /bin/security/authorizables.json HTTP/1.1] com.day.cq.security.util.AuthorizableJSONWriter Unable to get jcr:created property from authorizable /home/users/a/adminaux
28.04.2015 16:30:14.306 *WARN* [216.46.22.130 [1430253014295] GET /bin/security/authorizables.json HTTP/1.1] com.day.cq.security.util.AuthorizableJSONWriter Unable to get jcr:createdBy property from authorizable /home/users/a/adminaux
28.04.2015 16:30:14.348 *WARN* [216.46.22.130 [1430253014295] GET /bin/security/authorizables.json HTTP/1.1] com.day.cq.security.util.AuthorizableJSONWriter Unable to get jcr:created property from authorizable /home/users/a/atest
28.04.2015 16:30:14.348 *WARN* [216.46.22.130 [1430253014295] GET /bin/security/authorizables.json HTTP/1.1] com.day.cq.security.util.AuthorizableJSONWriter Unable to get jcr:createdBy property from authorizable /home/users/a/atest

I have installed SP2.

Thanks,