User cannot signup due to duplicate values in category notification states

[codinghorror (Jeff Atwood)]

There is another report of this at

Discourse DB Error When Creating New Users via SSO Login

Summary Discourse DB constraint error because of duplicate key values generated when users without an account attempt to log in via SSO. Causes internal server error (500) to be seen via external proxy. Discussion On August 28th or 29th, I updated Discourse to the latest beta (v2.4.0.beta2) along with all the installed Discourse plug-ins. Around the same time, I also updated SeAT, and reconfigured Discourse to use a UNIX socket, which the external Apache can proxy/reverse proxy to. Prior to t…

Anything we can do to assist @sam?