Metadata on dataset descriptions is not always present

[EnnoMeijers]

On the presentation pages of datasets in the frontend the metadata section is often empty, see for example the page for https://data.colonialcollections.nl/nmvw/collection-archives (title: NMVW Collection Archives). There is no reason given why the metadata is not shown.

[ddeboer]

There is indeed a large number of orphan datasets.

In this particular instance, I was able to re-register https://data.colonialcollections.nl/nmvw/collection-archives, which makes the metadata section visible. Perhaps something went wrong here with moving from the original registration URL https://colonial-heritage.triply.cc/nmvw/collection-archives (which now redirects)?