phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('711b4e546741387837b8f9e2d2b7c835', -1, 1511224504, 1511224504, '36a2a6d6', 0, 0, 0)

Line : 187
File : sessions.php