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 ('5a905e16c951a5f5211588ee1463c423', -1, 1715313667, 1715313667, '12d8bea7', -9, 0, 0)

Line : 189
File : sessions.php