Error syncing lockdown repo after kernel upgrade on PureOS 11

Just upgraded to kernel 6.1.0-38-amd64 on PureOS 11. When I went to update the system afterwards using apt I got an error for the repository below. Anyone else reproducing this issue?

E: The repository 'https://releases.lockdown.systems/debian prod Release' no longer has a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
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This is not a PureOS repository. You have added some external repository to your system and there’s some problem with it now (perhaps it was discontinued?), unrelated to the kernel upgrade.

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Thanks, does appear now that the timing was coincidental.

The repo most likely belongs to Micah Lee’s Cyd app. which I have installed.

Another apt update operation completed today without errors.