Parameter - change step - not saved in part/product?

[Mechv5]

Hello,

I have a positioning parameter in a product and I want to modify the value of it only in 10 mm steps, so I'm using the "change step" option in the contextual menu and everything is ok. But if I close my product and open it again, the changing step of that parameter is again 1, as default... would it mean that I have to make a "change step" each time I open the file?

Regards,

Mechv5