phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('0efa21e4e1c11fac50b31ab6a16d39d4', -1, 1713303943, 1713303943, '0391c947', -4, 0, 0)

Line : 187
File : sessions.php