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 ('0cc6fb3f7f83e718c2d611531ee38792', -1, 1487770463, 1487770463, '36cd6a8a', 14, 0, 0)

Line : 187
File : sessions.php