Please Help! Error in Admin "Member"

[Galaxy Computers]

When I check the members in the admin area I get this error:

Database Error Unknown column 'mem.is_spammer' in 'field list'
File: /home/XXXXXX/public_html/support/forum/Sources/Subs-Members.php
Line: 1229

[Illori]

have you installed any mods? sounds like one got installed but did not do the database edits that go with it.