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 ('61958f90b17ee6e5063fe966b9667e2f', -1, 1505990829, 1505990829, '4a7d4c62', 0, 0, 0)

Line : 189
File : sessions.php