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 ('b40ace0e8f0e4672c2f897a8e49d6ab3', -1, 1715101707, 1715101707, '12d9e423', -7, 0, 0)

Line : 189
File : sessions.php