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 ('b50206e1038ed7c08b8b3c46cb9c0d29', -1, 1713985824, 1713985824, '030f9c8c', 3, 0, 0)

Line : 187
File : sessions.php