phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 144 Table './phpbb/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, session_admin) VALUES ('c0e6e3d5a92e09eb8307e2cc65e3688f', -1, 1508476854, 1508476854, '36516e72', 10003, 0, 0)

Line : 189
File : sessions.php