Could be a battery firmware update in the second round, or if you are using a second battery.
I wish DJI would specify what the firmware update or required is going into: RC box, bird, or battery, or even the GO or Assistant app. They are pretty cryptic now. I'd also like a means to shut off all their notices too, unless I want to look for one or maybe roll back to an older one which seems to become less likely with each version change.