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 ('da1d74cf6a91a45e3aa5a2dd71050d43', -1, 1467186795, 1467186795, '36e0bc86', -4, 0, 0)

Line : 187
File : sessions.php