Saving the PSD file distroyes the character animtor project

Hey Guys.

I just ran into a issue that keept me busy for the last few hours.

I want to use the character "sticky" as a starting Point for a new character, so that  I only Need to switch out parts and save the rigging time.

BUT once I open the character in CA and PS everything works fine, character reacts, stickst to the Floor and so on. When I do the simplest changes in the PSD file. (even disable a layer, enable it again and save) Back in CA the character seems to have changed its rigging. It is no longer attached to the Floor and I see multyple layers that have not been there before.

is there any help?

I only want to use it as a base, cause I Need a character with Walking behaviours and the parallax movement as well as the side views.

Any help is much appreciated!

All the best

Flo