How to Disable Force-Update prompts?

Hi,

I'm creating a customized installer for work purposes, of Windows 10 1607 Education x64.

I am integrating the latest cumulative update and the latest servicing stack update using DISM or NTLITE, downloaded directly from Windows Update catalog. This however results in a full-screen force-update prompt appearing, that goes like "A 3 GB update is needed, it will be downloaded soon" I can click "Okay" and "Maybe later".

I am worried that this update would eventually be downloaded and installed. I specifically want to use version 1607, and I do not want to upgrade further than that. I am aware of the security risks but this is an offline terminal where we need this version.
I know I can disable Windows Update service (I did) but I don't want this prompt to appear every time when I install the servicing stack and cumulative updates. Is there any way, any registry tweak or group policy tweak to defer this prompt? Much like the Windows 10/11 free upgrade offer could be declined, and made not to even appear, I'm looking for something similar, as this is just as intrusive. I hope you can come up with something!

Thanks.

Thank you so much for your immediate reply @Paul Black! It is very helpful, and exactly what I am looking for. Right now I'm trying to find out if I can do this on 1607 as the article says 1803 or later. But still, this is exactly the setting I need, now I know its name: target feature update version! Thanks!