It sounds like you are trying to import back into the original realm some changes you made in a copied realm.
In general this is a bad idea.
The original realm from which the export is made should never have exports from "child" realms copied back into it. This will cause problems later on when trying to export from the original realm again.
It is best to only export from some realms and import into others.
Farling
Author of the Realm Works Import tool, Realm Works Output tool and Realm Works to Foundry module
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