phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './grom_forum/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 ('463dd9237b5e7053cdb9cc3068201a93', -1, 1484635580, 1484635580, '36cc8ace', 33, 0, 0)

Line : 189
File : sessions.php