[BUG] Duplicated house door ID

[Elveniane]

The "Door ID" numbers of the houses are being assigned incorrectly—they are duplicated. The same ID is assigned to multiple doors and windows.

The duplicate ID warning only appears when viewing the properties of the "second" door/window. When viewing the properties of the "first," "third," and subsequent doors with the same duplicated ID, RME does not recognize any issue with the door ID.