Where can I fix this. wrong prefix for DB. i know my prefix so I think it's only to edit some file, need to know the name.

SQL errorDB function failed with error number 1146
Table 'xxxx.xxxxxx.phpbb2_users' doesn't exist SQL=UPDATE phpbb2_users SET user_avatar_type='0', user_avatar='' WHERE user_id=''
SQL =

UPDATE phpbb2_users SET user_avatar_type='0', user_avatar='' WHERE user_id=''