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 ('87b3b07eed8a4b0c9a70caa014dc34c2', -1, 1714093839, 1714093839, '127598fb', -4, 0, 0)

Line : 187
File : sessions.php