why upgrade request on my beginner steps?

I have created a PB, 2 weeks ago for education usage and today while updating some files I have received a request to upgrade. Sorry I do not quitly understand the meaning of this request, as far as I understood I could use and upload without any further problem. Since i am a beginner user I might be doing something wrong, so I kindly request your help to make my PB site keep running smoothly! I thank you beforehand
My best regards
Elisa Prenna
 
sad I’m frustrated
Inappropriate?
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