phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('c726edc0c1358521b3c823ab2b1f3bb8', -1, 1715215891, 1715215891, '12de234d', -9, 0, 0)

Line : 189
File : sessions.php