phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './phpBB/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 ('e0ec6b6c15c158194cfcc5817cc8df21', -1, 1461986610, 1461986610, '36572761', -1, 0, 0)

Line : 187
File : sessions.php