Adding a new PGP key not working

I am trying to add my new PGP key to keybase using `keybase pgp select` and getting errors.

Steps I did:
1. Removed the old PGP key from keybase
2. Do `keybase pgp select` from my command line
3. Selected the key I want to upload.

It gives me the following error: `▶ ERROR key generation error: non-signing keys can't be sibkeys (error 911)`

What should I be doing?

Start by reproducing the reported flow with `keybase pgp select`, including removal of the old key and selection of the new one. Trace the source of `key generation error: non-signing keys can't be sibkeys (error 911)` and compare the command's expectations with the selected key; done means identifying the cause and documenting or fixing the supported behavior.

Written by the indexing model from the issue text.