phpBB : Critical Error

Error doing DB query userdata row fetch

DEBUG MODE

SQL Error : 1194 Table 's' is marked as crashed and should be repaired

SELECT u.*, s.* FROM phpbb_sessions s, phpbb_users u WHERE s.session_id = '7b68a6e8d1e4163953b9d4a39a753329' AND u.user_id = s.session_user_id

Line : 315
File : sessions.php