Open Philipp91 opened 1 month ago
Following these two links, there's only one occurrence of 9391
:
9391 Neue Kundensystem-ID holen
Not much information from the specification's side. But it seems like we're supposed to trigger a fresh sync when receiving this response code. Presumably bank servers use the Kundensystem-ID for something like an auth token, but once that expires, it needs to be refreshed, so then they send this code.
The implementation of this functionality in hbci4java seems to confirm that all we need to do is trigger a sync.
https://www.f-i.de/fints