QGIS 3.10.8 and 3.14 crashes when opening attribute table after setting up a photo field and using lay-out form with attachment widget

I am looking for a way to address the following problem described at GitHub.

https://github.com/qgis/QGIS/issues/39063

I am looking for a repair method of the broken point layer, I mean a way
that:

1. The layer does not freeze or craches anymore and
2. A way that I can add the photo field in the problematic 2 forms (‘GevaarlijkeBomen’ and ‘TBomen_overige’- both were
   possible in the beginning, so should be possible again when the layer is
   repaired?).

Note that I added the broken layer in the GitHub page/issue (zip-file). In other
words, one could replicate the problem if necessary.

---

Seems to be a bug because of data corruption… github.com/qgis/QGIS/issues/39063