How to re slice a sprite without loosing the names

I'm working on a game that is still subject to small changes and improvements. I have created a sprite with all the icons and I used the sprite editor to define the individual icons, I changed the names of those slices and have used them in my game with no issues/

T$$anonymous$$ng is, I need to add new icons to the sprite, for Unity to pick them up I need to re-slice the sprite, but t$$anonymous$$s resets the name of all existing slices to default.

Is there a way to add more icons and re-slice without needing to rename all icons?

Thanks in advance!