Linux kernel gpg:未找到有效的OpenPGP数据；使用添加存储库

因此，当我输入

sudo apt add repository ppa:elementary os/stable

时，它返回

 More info: https://launchpad.net/~elementary-os/+archive/ubuntu/stable
Press [ENTER] to continue or ctrl-c to cancel adding it

gpg: keybox '/tmp/tmp9bk0u0va/pubring.gpg' created
gpg: /tmp/tmp9bk0u0va/trustdb.gpg: trustdb created
gpg: key BF36996C4E1F8A59: public key "Launchpad PPA for elementary OS team" imported
gpg: Total number processed: 1
gpg:               imported: 1
Warning: apt-key is deprecated. Manage keyring files in trusted.gpg.d instead (see apt-key(8)).
gpg: no valid OpenPGP data found.

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我认为这是我的问题的根源，只是需要一些帮助来解决它

如果你说明了你的操作系统，这会有所帮助。这大概是一个Ubuntu问题，应该在askubuntu.com上提问