Family parameter set value operation failed

[adumas7BF2H]

Hi everyone,

We are trying to put parameters to our revit objects, but it seems we have an error we don’t understand.

Here is the whole script :

Here is the error :

And you can see our nodes with more precision :

I didn’t find any solution on Google. The error has disappeared but it came back.
Do you have any idea on what is the problem?

Thanks a lot in advance.