Mutable bake instance overwrite instead increments

We are using Mutable and right now we can't overwrite already baked SK instances. This occurs when, we have a set variation for a character and we address a feedback on one of the used skeletal mesh parts. Then we would need to use the Customizable Object Instance (COI) to "Bake Instance' again and overwrite the existing one. But we can't overwrite it - it increments in 5.6.

For example:

when adding 'CustomName' as the file name string, the body skeletal mesh asset will be named 

SK_CustomName_Body_Body_8

If we have manually renamed the used Skeletal Mesh file to something like

SK_CustomName_Body_01 or SK_CustomName_01

We can only use "Save as SK_CustomName_01" to overwrite it from the baked skeletal mesh and then delete it.

Steps to Reproduce

in UE 5.6 - press bake more than once with the same Customisable Object Instance and type the same file name in the input