phpBB : Critical Error

Error doing DB query userdata row fetch

DEBUG MODE

SQL Error : 145 Table '.\phpbb_forum\pb1_users' is marked as crashed and should be repaired

SELECT u.*, s.* FROM pb1_sessions s, pb1_users u WHERE s.session_id = '843e1e9c25600c6ca292466622d65d11' AND u.user_id = s.session_user_id

Line : 315
File : sessions.php