Database Error

Query: "(SELECT authid, name, created, sid, length, reason, bid, type, RemoveType, ends FROM sb_comms ORDER BY created DESC) UNION ALL (SELECT authid, name, created, sid, length, reason, bid, type, RemoveType, ends FROM sb_bans ORDER BY created DESC) ORDER BY created DESC LIMIT 0, 50"

Error: Illegal mix of collations for operation 'UNION'