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 ('3a5fc69b5b45de110ee3113e8b2fbbeb', -1, 1711693136, 1711693136, '2cc8ae9d', -9, 0, 0)

Line : 187
File : sessions.php