Comment 25 for bug 1899180

block-proposed is for the development release (Hirsute) only. I'll leave you to remove that if you want to unblock Hirsute.

block-proposed-{bionic,focal,groovy} are needed to mark your uploads as "staged" for these releases. Please leave these in place. See the documentation at https://wiki.ubuntu.com/StableReleaseUpdates#Staging_an_upload