Can't import PGP key

[hardcore-sushi]

Describe the bug
The PGP key provided in the README can't be imported with GnuPG.

To Reproduce
Steps to reproduce the behavior:

$ gpg --version
gpg (GnuPG) 2.5.20
libgcrypt 1.12.2
Copyright (C) 2026 g10 Code GmbH
License GNU GPL-3.0-or-later <https://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Supported algorithms:
Pubkey: RSA, Kyber, ELG, DSA, ECDH, ECDSA, EDDSA
Cipher: IDEA, 3DES, CAST5, BLOWFISH, AES, AES192, AES256, TWOFISH,
        CAMELLIA128, CAMELLIA192, CAMELLIA256
Hash: SHA1, RIPEMD160, SHA256, SHA384, SHA512, SHA224
Compression: Uncompressed, ZIP, ZLIB, BZIP2

$ gpg --import <<EOF
-----BEGIN PGP PUBLIC KEY BLOCK-----
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=wnah
-----END PGP PUBLIC KEY BLOCK-----
EOF
gpg: can't check signature with unsupported public-key algorithm (27): Invalid public key algorithm.
gpg: can't check signature with unsupported public-key algorithm (27): Invalid public key algorithm.
gpg: can't check signature with unsupported public-key algorithm (27): Invalid public key algorithm.
gpg: can't check signature with unsupported public-key algorithm (27): Invalid public key algorithm.
gpg: key 9D821FB45EC0E1AA: no valid user IDs
gpg: this may be caused by a missing self-signature
gpg: Total number processed: 1
gpg:           w/o user IDs: 1

Expected behavior
Import working.

Additional context
Also tested on Debian with GnuPG 2.4.7 and on Arch with GnuPG 2.4.9. Same error: Invalid public key algorithm. How did you generate your key ?