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 ('231d7b4e2641c22b0099db4c37c69aec', -1, 1713310944, 1713310944, '0310515e', -10, 0, 0)

Line : 187
File : sessions.php