previous update last month today they've just pushed PS4 Firmware 6.02 live with the changelog simply stating the following:
PlayStation 4 system software update
About PlayStation 4 system software version 6.02
Main features in version 6.02 update
Download: PS4 Firmware 6.02 Update (US) / PS4 Firmware 6.02 Update (EU) / PS4 Firmware 6.02 Update (UK) / PS4 Firmware 6.02 Update (AU/NZ) / PS4 Firmware 6.02 Update (JP)
- This system software update improves system performance.
As always DON'T UPDATE if you wish to use PS4 game backups and homebrew apps when a jailbreak exploit arrives, we'll add any related Tweets below as PlayStation 4 scene developers have a chance to examine it... and as PuffinMan points out, this 6.02 PS4 update likely fixes the PS4 Message Bug recently reported.
Here are some guides for those new on How to Block PS4 Firmware Updates, How to Delete Downloaded PS4 Update PUPs that haven't been installed yet, How to Update to a Specific PS4 Firmware and also some PS4 HEN Update Blocker Payloads.
Cheers to @rickylyh for sharing the PS4 6.02 OFW screenshot on Twitter earlier!