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 ('a70ab9f9f45ab1779d5d4aba7053ccc6', -1, 1714617026, 1714617026, '038b484e', -50, 0, 0)

Line : 187
File : sessions.php