hmmm... I don't get that error when I repair HS.
I looked through my mod and through the SPT item database to see if anything had the property "Destructibility", but I could not find anything. I'm wondering if this is an error related to something else.
There is a property on items called "Indestructibility", but my mod is correctly referencing that property.
Looks like what you are referencing here is the property that is called in the RepairService.ts file that is part of the source files for the Server itself. That is not something that I can fix with this mod.