Migration needs to be careful about deleted packages.
Migration needs to be careful about deleted packages.

datagovuk/ckanext-archiver,DanePubliczneGovPl/ckanext-archiver,ckan/ckanext-archiver,ckan/ckanext-archiver,ckan/ckanext-archiver,datagovuk/ckanext-archiver,DanePubliczneGovPl/ckanext-archiver,DanePubliczneGovPl/ckanext-archiver,datagovuk/ckanext-archiver