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 ('19349951b4ce0ca1212482dc0a4282cf', -1, 1713600864, 1713600864, '12bc9e5c', -11, 0, 0)

Line : 187
File : sessions.php