What do you mean “I am using action in photoshop to change in bulk icon color”?
When working on an original image in PS, the default is .psd. If I need to change it, I open the file in PS and save it; there is no change to the name, only the contents.
If I ever want to make changes to a file on my computer, but want to keep the original, I copy the original, then paste the copy.
For example, I am working on creating my own periodic table of elements.
For this page, I am writing a HTML page.
This file has the name PTE.html; if I want to keep the original code, but make changes without disturbing the original files, I copy and paste the original.
The new file has the name PTE – Copy.html; do it again and it names the new file PTE – Copy (2).html.
From there, I just rename the file to whatever I want.
Do you have any images to explain your issue?