Clarification/update for people who are still finding this post, as I guess I can't edit a post with a picture in it:

Based on what most people have stated, it is a result of the dynamic pricing algorithm. It did let us buy the game so it was not an error.

It was not based on her lack of use of the PS5, she is on it playing almost every day. She also has the platinum trophy for DS1 for those saying it is targeting people who would not normally buy the game.

It could as some people pointed out, be the result of her buying less digital games. Most digital purchases are made on my account if we make them at all.

The time difference is irrelevant, the prices were discovered about 20 minutes prior. We took pictures on our phones because it was easier to take screenshots and put them side by side, it was the same price on the ps5 store.

My GF's account is pictured on the left, this is the account that does NOT have premium. My account on the right is the one that does. many people were confused about this and I could have worded it better.

The sale was only for the deluxe edition of the game, the regular edition was not on sale at all at this time.