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 ('bc89d71a0f42c3552db5e686a5801b4f', -1, 1713880730, 1713880730, '0395fb9b', -8, 0, 0)

Line : 187
File : sessions.php