phpBB : Critical Error

Error doing DB query userdata row fetch

DEBUG MODE

SQL Error : 145 Table './surelion_mosaicinfo/phpbb_sessions' is marked as crashed and should be repaired

SELECT u.*, s.* FROM phpbb_sessions s, phpbb_users u WHERE s.session_id = 'c47e3f2f6e4be3178d3d15cd0a1deecf' AND u.user_id = s.session_user_id

Line : 315
File : sessions.php