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 ('d747c0fbdc4e7400b72c47c3658821e1', -1, 1713499384, 1713499384, '038b4683', -7, 0, 0)

Line : 187
File : sessions.php