Now I am receiving this type of message:

SELECT t1.USER_ID,t2.GROUP_ID FROM ubbt_USERS, ubbt_USER_GROUPS as t2 WHERE t1.USER_ID <> '1' and t1.USER_ID = t2.USER_ID and t4.GROUP_ID IN (34)GROUP BY USER_ID ORDER BY USER_ID ASC

Unknown table 't1' in field list

Should I remove this unknown table? If so, can you give me the command to do so?