Manure heap has lost attached stables

[GnomAtom]

Hello everyone!


I am looking for a solution to the problem that the dung house has lost the connected stable buildings.
Ingame, the connection to the stables is displayed with the note "Connected to". If no stable is entered there, there is no manure.

As a quick solution, a new dung heap can of course be built, which then contains these connections (XML entry?) again. However, this is not a viable solution for placeables that are built into the map or defined as mandatory at the start.
Despite an intensive search, I have not yet succeeded in identifying the location in the savegames where the dung heaps are connected to the stables.
Is there a solution or does anyone know why the game behaves like this?

Many thanks in advance!

GnomAtom