Use 5D5BD2BB606BE4B60714162307000ADCB05A5BC4 instead. You can also get the key from Ubuntu Keyserver or keys.openpgp.org.
The following paragraphs are the first lines from the signed message. To view the full message (including key blocks) and verify its signature, download message.txt. The signature using the old key is at msg.sign_old.asc, and the signature using the new key is at msg.sign_new.asc.
Note: the HTML generator and renderer may manipulate the message in unintended ways. Therefore, the snippest below should never be used for signature verification.
From: Yuuta Liang email@example.com
My old GPG key (Fingerprint: F99854A5DAA0D15DF2FEF89CBCD2B4B9E853C284, complete key block: Note#1), has been deprecated on Jan. 19 / 2023 00:10 PST, in favor of the new GPG key (Fingerprint: 5D5BD2BB606BE4B60714162307000ADCB05A5BC4, complete key block: Note#2). The old key is no longer used and is not considered secure anymore. Please switch to the new key instead. The new key will be available for download at both keyservers and https://yuuta.moe/key.gpg.
This message will be signed using both the old key and the new key.
Yuuta Liang Jan. 19 / 2023 00:10 PST
…… (see the original message)