phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 145 Table './nwforum_1/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 ('00400dec66e1b5d45d5cf75709b355f6', -1, 1558465906, 1558465906, '36a72ff8', 18, 0, 0)

Line : 187
File : sessions.php