docker: "Error response from daemon: missing signature key"

Question

I deleted some images from our registry's storage backend and caused some issues. So, in order to restore the last, "latest"-tagged image, I pushed it from my local Docker, since I know it is the most up-to-date. All of the other systems in the network that need it have suddenly started failing with a new error: "Error response from daemon: missing signature key".

There appeared to be no useful suggestions or documentation online. I've inspected the latest image and its parent, and its parent, etc.. from my local host, and I am able to see information on all of them. This error seems to be specific to pulling/running.

Answer 1

I just had this error on a system simply because the daemon there was too old (and I was connecting to it with a newer client).