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 ('83dc814ced42387ff55435aa61a5ee97', -1, 1714072943, 1714072943, '0316b551', 2, 0, 0)

Line : 187
File : sessions.php