Hello @KKaoChi ,
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Does the Word document template you mentioned refer to your custom Content Type? And the custom Content Type has a new Word document template.
Then you upload the Word document template to empty LibraryB.
Therefore, when you click this Word document template file, you will find that the original metadata/properties of this document template are overwritten with the default metadata of LibraryB.
If you want to use these metadata/properties of this document template in LibraryB, we recommend that you add a custom Content Type to LibraryB.
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