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 ('3033ff0b1caaf06651bf9c790ac4b8f6', -1, 1713887140, 1713887140, '0d3bda93', -9, 0, 0)

Line : 187
File : sessions.php