An error message appears when importing metadata

When I tried to import exported example metadata & assets, I got the following error message. Is this a problem? What should I do?

Error message: Conflicts found while importing assets. It is strongly recommended to fix the conflicts in the source files. Do you really want to import?

The metadata I tried to import is the one exported Cluster_Demo_Art_FINAL.psd with Qt Bridge Photoshop extension. The data is attached as export.zip as below.

The imported contents are attached as cluster.zip.