Max size fields range

Hi!
I’m using PPOM pro and also PPOM addon image drop down because my product has too many variables! When I say too many, I mean it. For this reason I cannot use the woocommerce variables part.
All variables must be set as a “or” condition.
So I added 9 fields in the same meta group (each of them has up to 23 images). But now it seems like I have reached the max size of possibilities.
While adding the 9th field, it uploaded 11 images in the “images” group, and so it stopped there. When I try to add more and save the settings, it says “no modification found, please try again” and it removes the last images I added. It keeps only those I added earlier.
It seems I reached the max range.
Is there a way to change this in the plugin settings?
Because I really need to add like 8 more fields (around 100 images more than these I already uploaded).

This is the page:
http://shop.bortolettivenezia.it/product/demo-sigillo-ceralacca/

(first 5 images are the biggest groups, each one of them has other groups when clicked on – all of them must be only set as “or”. I made it to the last box images of the first 5, and set only the first groups, but I have 8 more)