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 ('8df2f0bd798a6f1a6d22a5d04f846706', -1, 1713947012, 1713947012, '12745a8d', 2, 0, 0)

Line : 187
File : sessions.php