Error deleting unreferenced blobs in Full maintenance

Finished full maintenance.
ERROR error deleting unreferenced blobs: error looking for unreferenced blobs: error iterating blobs: error processing directory shards: error reading directory: error reading WebDAV dir: PROPFIND /q06/cb1/: 429

There is no entry 429 under /q06/cb1/:
How can I fix this error ?
All other steps of Full maintenance working fine
and also a Snapshot full Verify finds no problems.

This probably relates to the 429 HTML error code which means “Too Many Requests”. Unfortunately there doesn’t seem to be an option to configure the number of requests for maintenance.

There is an issue about this problem: Full maintenance - error deleting unreferenced blob - error reading WebDAV dir: PROPFIND /p9f/39e/: 429 · Issue #4038 · kopia/kopia · GitHub

You will find some additionnal informations there.