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 ('f25c78ceac3c50054191f73d8536f522', -1, 1519564291, 1519564291, '3690549b', 1, 0, 0)

Line : 189
File : sessions.php