How to fill an area without a smooth transition?

Question

Adobe Photoshop

Previously, I did not encounter such a problem, now a smooth transition is created by filling the area.
Question : how to fill an area without overflowing the edges.

Answer 1

when you create a rectangular area, on the top panel, check if the feather is set?

Answer 2

your question cannot be answered because you are using the Russian interface. I and other pros will not understand your settings, and you will not understand my advice, you can only guess,
rearrange photoshop with the choice of the English interface language