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 ('6d933b4553e84f745ecea597c7bfd827', -1, 1752686025, 1752686025, 'd849d890', -2, 0, 0)

Line : 189
File : sessions.php