N: This must be accepted explicitly before updates for this repository can be applied. See apt-secure(8) manpage for details.

Error

N: Repository 'https://...' changed its 'Origin' value from 'morph27' to 'aws-session-manager-plugin'

Reason

I have recently changed the repository metadata fields, which breaks secure apt updates. Unfortunately, there is no way to prevent this.

Solution

As this change is intended, you can unlock updates again by executing apt-get update --allow-releaseinfo-change.