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) VALUES ('1e2aaf477b11f7c9eea443222f9fb8dd', -1, 1714401774, 1714401774, '0315a257', 21, 0)

Line : 158
File : sessions.php