2
Hmmmm... I think I remember seeing a post like this somewhere else on the forums.... I'll see if I can do some digging and post back.
In the meantime, it might be a MySQL error. Try repairing the table using a MySQL Database Management program, like PHPMyAdmin. Remember to back up your table before performing this operation, though!
Also, just so ya know, the latest version in the 2.2 branch is 2.2.4. Try upgrading your system to that version as well.
Reparing it manually... hmmm... an active user should have a level assigned to them besides 0, I believe. You could try adjusting the number of posts and their assigned level, as well as date joined. Try using Xoops' "Activate User" interface as well.
Well, if I find that post, I'll respond back to let ya know.
Good luck with your site!
-zimmi88 =)
EDIT:
Well, I wasn't able to find that specific post, but here's a recent post with a date problem similar to yours.
https://xoops.org/modules/newbb/viewtopic.php?topic_id=52152&forum=20&post_id=231902#forumpost231902
"Need coffee, keep away..."