@rmx The recommended way is always to do it the clean way and adjust your Spine project accordingly.
If you don't want to do that, you could either write an Editor script (see the docs here) in Unity which modifies certain keys in timelines of the SkeletonData, but that's much more work.
You could also export the skeleton as .json and then open the file in a text editor and use string replacement operations. Then you could use Import Data.. to re-import the skeleton project into Spine from the modified .json file.
