Can I prevent completed days from changing as I lose weight?

When I update my BMR because my weight has changed the app updates the number for completed days as well as days moving forward. Is there a way to stop the number on completed days from changing? In the grand scheme of things it's not a big deal because I really only need to focus on the current day, but it does mess up the trend data which makes it hard to get a good look at the big picture. I will note I'm using a custom BMR, does this issue still occur if you have the app calculate your BMR and just change your weight in the app?

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