Couldn't delete my private key

When trying to delete the private part of my GPG key from the website, the service return an error code:
`{"code":100,"desc":"missing non-optional field kid","fields":{"kid":"missing non-optional field kid"},"name":"INPUT_ERROR"}`

Same thing if I try to export the private key:
`Error: Failed to get and unlock your private key`

It seems there is some errors on the edit action for the PGP keys. See for example the (maybe) related issue https://github.com/keybase/keybase-issues/issues/4060

Is there a workaround to this?

Start by reproducing the website actions for deleting and exporting a private PGP key, then compare the behavior with the related issue 4060. Trace the edit action responsible for these operations; done means both actions complete without the reported missing-kid or unlock errors.

Written by the indexing model from the issue text.