How to hardcode the CMYK color in a gradient in Illustrator?

Question

Working with color

There is a need to set the colors in the gradient in CMYK with clear values.
I enter values ​​for each point in the gradient in the CMYK model, remove the selection from the element where these rule values ​​are, then press it again and the values ​​​​are randomly close to these.
It is critical for me that, say, there is no magenta in the color at all.
Bomb already)
Tell me please!