???? Group copy ????

Sometimes, creating a filter, it happens that we must make exactly something that we have already done in another of our filters.
We may re-make it from zero if what we have to do is not much.
If instead it is a lot of work, it is smarter to simply copy that part from our other filter.

Well, doing this, I have recently saw that copying Groups generates strange errors.
There is surely a reason for these errors, but I don't get it.

Some groups, once copied in another filter, appear completely changed.

Other Groups were ok in the first filter and, once copied in the second, they show an error ( the red circle with exclamation mark ) even before to connect them to the new filter.

Sincerely, because they are from my own filters, I can say that I didn't apply any setting that I didn't know how to control.
I don't understand why they change.
They are Groups that were not receiving any input from the other filter. So there is noting that was disconnected.

A practical example ?
My filter Oni Grin : https://www.filterforge.com/filters/12581.html
Select the whole filter except the result.
Then copy it in my other filter Paillettes Paint : https://www.filterforge.com/filters/12635.html.
You get an error in the two Bombers. Why?
The whole filter is copied. If it was ok before, why not ok anymore?

Same result if you delete all the components in the filter and then undo.

Something to do with the internal numbering of the groups, perhaps?

(Then again, I'm not even sure why your original filter doesn't give the particle adapter warning although it has no Particle Adapter component there.)