I've started a Saka campaign and I have a problem:

For a reason or another, it looks like I'm unable to build allied governments. The option is unavailable either if I destroy the ancient government or if I try to build it on top of it.

If I destroy the ancient government (like I did in Baktria), I only have the indigenous settlement option, I can't build a military occupation...

So far I tried in Marakanda, Baktria and A-Ariana and it failed.

It looks like the right place to ask my own question, sorry for squatting...