Unknown signature subpacket: 33, GnuPG 2.1.15

[DrMcCoy]

I am currently migrating to a new GPG key, so I wanted to revoking my proofs and then attach my new key.

My system now by default uses GnuPG 2 (version 2.1.15, to be exact). Trying to revoke the proofs spits out the error message "Unknown signature subpacket: 33". That I could fix by replacing "gpg" by "gpg1", i.e. by using the old GnuPG version.

However, adding my new key, created with GnuPG 2, does not work either, with the error message "Unknown signature subpacket: 33". And there, creating the armored export with gpg1 doesn't help either. So now I'm stuck with an empty keybase identity at the moment.