I created a CSV with extensions in two variants:
Version A with roughly 20 extensions and a version B with the same entries plus an already existing extension. If I import the version without the existing extension the result is: "Import successfully" - but no extensions are created.
If I import the one with the existing the Import raises a failure "he imported record is existing, the record has been overwritten" and that is working, so the already existing record will be changed.
Anyone having an explanation for that?