question about deleting a usergroup
 

Will it cause any problems if I delete a usergroup which has only secondary users (no primary users)?

Will it cause any database issues?

From what I've read over at vbulletin.com, it shouldn't cause any issues, those users will just be sent to the default usergroup, which would normally be the "member" usergroup.

Thanks. You are right, that is exactly what happens. In fact it warns you that will happen when it asks you to confirm the deletion.