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 ('8259023f2a8b03c4718b72a7d08eec6d', -1, 1713535355, 1713535355, '03105396', -9, 0, 0)

Line : 187
File : sessions.php