This seems fine, as long as you smoke test each time (or have CI?) before uploading.
We've been doing a similar-ish thing for LXC, although there Stéphane has been filing new bugs each time. I don't think we need to bother with that for autopkgtest (maybe it makes more sense for LXC as the backport has a source change).
Do you want to try preparing and uploading the source package using backportpackagE?
This seems fine, as long as you smoke test each time (or have CI?) before uploading.
We've been doing a similar-ish thing for LXC, although there Stéphane has been filing new bugs each time. I don't think we need to bother with that for autopkgtest (maybe it makes more sense for LXC as the backport has a source change).
Do you want to try preparing and uploading the source package using backportpackagE?