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 ('4e384f47c41fa2aef38b03a6b1c72d89', -1, 1713578602, 1713578602, '038e626c', 0, 0, 0)

Line : 187
File : sessions.php