Update Error - release is not valid yet

[Şerban S.]

Sorry my post was about the apt error messages reported in the post by buck_108.
These will cause the update/upgrade to error whether run from the GUI or command line.

The apt warning messages about the signing key should not stop the update/upgrade.

"Should not stop" is the theory. In fact, it does. It breaks Synaptic PM and also Lite Upgrade.
What works though, is:

Code:

sudo apt upgrade -y

I already had three or four errors of this kind, mostly from Mozilla PPA, but also from OpenShot PPA.
Same problem on both repos: RSA1024.

It would be useful to test it yourself.
On LL 6.6, they work without any problems, but on LL 7.0, the graphic update fails if there are new package versions for OpenShot or Thunderbird.
It seems that the security level RSA4096 is the new requirement and if the list update process fails, the update is stopped.

Even if you test, it might be irrelevant, since the security level update is largely bounded by the ISP resources and update policies.
On some servers, the security level might have been already upgraded to RSA4096.

Best regards, Șerban.