I think the key is:
W: Sources disagree on hashes for supposely identical version '2.1.0-1' of 'python-swagger-spec-validator:amd64'.
That is, you have two sources for that version and they disagree.
I think the key is:
W: Sources disagree on hashes for supposely identical version '2.1.0-1' of 'python- swagger- spec-validator: amd64'.
That is, you have two sources for that version and they disagree.