It seems to not always be possible to import the ECC NIST-P521 keys to all slots of the OpenPGP smart card.
I managed to import Authentication subkey to slot 3, but failed with other two.
I have searched for similar tickets, but not found any.
Before the import the slots attributes were set with scdaemon directly (as below), did not help either.
```
gpg-connect-agent "SCD SETATTR KEY-ATTR --force 1 19 nistp521"
gpg-connect-agent "SCD SETATTR KEY-ATTR --force 2 18 nistp521"
gpg-connect-agent "SCD SETATTR KEY-ATTR --force 3 19 nistp521"
```
#### Environment
- GnuPG 2.2.25, built from sources.
- Nitrokey Pro2 with OpenPGP 3.3.
```
root@stumpy:/app# gpg-connect-agent "GETINFO version"
D 2.2.25
root@stumpy:/app# gpg --version
gpg (GnuPG) 2.2.25
libgcrypt 1.8.7
```
#### Connected
- https://support.nitrokey.com/t/unable-to-generate-or-move-521-bit-ecc-keys-onto-nitrokey-pro-2/2725
- https://support.nitrokey.com/t/cant-import-nistp521-encryption-key-into-nitrokey-pro-2/1841/6
#### Logs
Logs from scdaemon ("filtered" is with status updates removed) and run logs (short and full) attached.
{F2044495}
{F2044494}
{F2044493}
{F2044492}
{F2044538}
{F2044537}