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 ('c7f0fdad231c066e6e9d24ae52f02a50', -1, 1484756826, 1484756826, '36a1f987', 29, 0, 0)

Line : 187
File : sessions.php