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 ('de319d5ed95f3da0d4dc2af2714b75f2', -1, 1493249717, 1493249717, '36e08a78', -4, 0, 0)

Line : 187
File : sessions.php