I did a fresh install because all of the sudden Oxwall was throwing me a ton of error which started with this one. Then with my fresh install it was there again:
Message:SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry '0' for key 'PRIMARY'
I think it comes from ow_base_user_online.. I have no idea why it starts with a zero:
http://screencast.com/t/VtpQJYgq
The error:
http://screencast.com/t/X0CdcBxWQMYo
Server:
Nginx on debian
MariaDB 10.1.2-MariaDB-1~wheezy-wsrep-log
MySQL-client versie: mysqlnd 5.0.10 - 20111026