When trying to sync packages into other places (under the same game), they automatically replace any rbxgameasset urls with the standard rbxassetid urls on any instance that takes a Texture/Image property.
Repo:
Place 1:
Create Model in workspace and upload as package.
Create a MeshPart in Model.
Upload an image under “Game” widget.
Set MeshPart’s TextureID to rbxgameasset://Images/[image_name]
Publish Changes to Package
Place 2:
Insert Package / Get Latest Package
Place 2 now has a version of the package that was uploaded from Place 1 but the URL on the MeshPart has changed from rbxgameasset://Images/[image_name] to rbxassetid://[image_id]