phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 144 Table './db_morepc/phpbb_sessions' is marked as crashed and last (automatic?) repair failed

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in) VALUES ('2f372de1c8d490e6c4784b50870f3fa2', -1, 1493577019, 1493577019, '1714db00', 0, 0)

Line : 158
File : sessions.php