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 ('474a2f1a77ca6afe2f82ecfc8f0c9fc6', -1, 1715099736, 1715099736, '0390a0db', -4, 0, 0)

Line : 189
File : sessions.php