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 ('96c6974b5740206c5469fbfccb75ea68', -1, 1714006271, 1714006271, '03858d06', 6, 0, 0)

Line : 187
File : sessions.php