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 ('d4a5e2d2c19d7868bf3f7c02c4dafc3d', -1, 1493326522, 1493326522, '36503a4b', 29, 0, 0)

Line : 187
File : sessions.php