Upgrade swap says I need to wait until yesterday

You didn't read wrongly neither I wrote it lamely. I have one slot for upgrade occupied by a 250MB upgrade. If I click on my 500MB available upgrade, it suggest to swap it. When I try to do it, it gives a red alert "Unfortunately, you'll have to wait after 16/11/2019 to make any change to your rewards." Bytheway, today is 18/nov, and my bill cycle started three days ago.

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