MultipleResultsFound exception when editing group

[Magne Ellefsen Nordtveit]

When editing a group, I am presented with a 500 error page, and the attached error messages sent on mail and in the log file.

Steps to reproduce:

Log in with administrator

Go to Admin -> user groups

Click on a group

Expected result: Group edit window opens

Actual result: 500 error page

Reproducability: Always, when the error first has occurred.

This first happened when editing a group, and adding users to the group, removing users from the group, and then hitting save on the permissions side.

[Magne Ellefsen Nordtveit]

I was able to delete the group, and adding a new group where this issue was not present. Something might have gone wrong when updating the group the first time. Downgrading the issue to minor, since it exists a workaround for us.

[Marcin Kuzminski]

Hmm i think i screwed up unique constrain on that table, need to check and try to reproduce that

[Marcin Kuzminski]

in 1.3.X i'd rewrote those constraints that will add extra layer to make sure they're unique