For spawned actors, you need to control IDs of instances stored in db files.
I would not let Unreal use auto generated actor names for spawned houses, I would instead create custom IDs to store them in a db row.
You can either use the “Make DB” functions to create a storage ID for a house blueprint, or directly store your own into a string property (of type Name) called "DBID ".
I prefere to use the DBID directly from Unreal Editor instead of using the “Make DBID” function:
When the blueprint is spawned, it will be registered with the ID default value:
