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 ('083541d8cf55243668c27e4fbe0bd991', -1, 1713999762, 1713999762, '038e234b', -8, 0, 0)

Line : 187
File : sessions.php