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 ('d685c75ee30db6a2e471d595caea9e71', -1, 1713957402, 1713957402, '12742ad0', -8, 0, 0)

Line : 187
File : sessions.php