Adding new uid to causes bad signature

[Rens Rikkerink]

Hey there Werner!

And thank you too for your reply.

> Please run
>
>   gpg-card
>
> to get infos on the card and used keys.

No problem at all:
$ gpg-card
Reader ...........: Yubico YubiKey OTP FIDO CCID 0
Card type ........: yubikey
Card firmware ....: 5.4.3
Serial number ....: D2760001240100000006223145200000
Application type .: OpenPGP
Version ..........: 3.4
Displayed s/n ....: 22 314 520
Manufacturer .....: Yubico (6)
Name of cardholder: Rens Rikkerink
Language prefs ...: en
Salutation .......: Mr.
URL of public key : https://github.com/ikkerens.gpg
Login data .......: [not set]
Signature PIN ....: not forced
Max. PIN lengths .: 127 127 127
PIN retry counter : 3 0 3
Signature counter : 1192
Capabilities .....: key-import algo-change button priv-data
KDF setting ......: on
UIF setting ......: Sign=off Decrypt=off Auth=off
Signature key ....: 4DCD2F5D0F303B60FAFDB469BA33F314281B2D1B
      keyref .....: OPENPGP.1  (sign,cert)
      algorithm ..: ed25519
      stored fpr .: 6AA6FC5597E89BDC19ADD6AFCF2FEC503A89BCFF
      created ....: 2022-10-26 18:20:54
      used for ...: OpenPGP
        main key .: <Authentication key>
        fpr ......: 6AA6FC5597E89BDC19ADD6AFCF2FEC503A89BCFF
        created ..: 2022-10-26 18:20:54
        user id ..: Rens Rikkerink <contact at ikkerens.com>
        user id ..: Rens Rikkerink <rens.rikkerink at luminis.eu>
Encryption key....: 993197BDCB9A09A16C4918DED4310EEF4B6582E2
      keyref .....: OPENPGP.2  (encr)
      algorithm ..: cv25519
      stored fpr .: FA57A5CBF68A422B1A54AC49A17864EE2C2102F8
      created ....: 2022-10-26 18:21:17
      used for ...: OpenPGP
        main key .: <Authentication key>
        fpr ......: FA57A5CBF68A422B1A54AC49A17864EE2C2102F8
        created ..: 2022-10-26 18:21:17
        user id ..: Rens Rikkerink <contact at ikkerens.com>
        user id ..: Rens Rikkerink <rens.rikkerink at luminis.eu>
Authentication key: EB59A450FF4E1B233C523B860E458EF6D043DFE8
      keyref .....: OPENPGP.3  (sign,auth)
      algorithm ..: ed25519
      stored fpr .: 408FB2EBC3DF3DBBE0143D9A29AD46D6F58287A3
      created ....: 2022-10-26 18:20:28
      used for ...: OpenPGP
        main key .: <this>
        fpr ......: 408FB2EBC3DF3DBBE0143D9A29AD46D6F58287A3
        created ..: 2022-10-26 18:20:28
        user id ..: Rens Rikkerink <contact at ikkerens.com>
        user id ..: Rens Rikkerink <rens.rikkerink at luminis.eu>

> Given that you have an uncommon primary key

Out of sheer curiosity, would you mind enlightening me on what part of
my primary key is "uncommon"?

Yours,
Rens Rikkerink