https://wccftech.com/playstation-4-system-software-7-00/

The next big PlayStation 4 System Software update, update 7.00, is going to undergo beta testing very soon, as invites for the beta are being sent out right now.

According to users, Sony started sending PlayStation 4 System Software Update 7.00 beta invites. Due to one of the new features being an increased maximum number for Party sessions, each user is getting sent a code that can be used 20 times.