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, session_admin) VALUES ('b6b347fd37e95e4f7beea4144ba3edd0', -1, 1713498479, 1713498479, '12e2bbc7', -11, 0, 0)

Line : 187
File : sessions.php