How to fix Do you want to accept these changes and continue updating from this repository? [y/N] in APT

If you are using the apt command (not apt-get), the prompt will appear directly:

sudo apt update

When prompted "Do you want to accept these changes and continue updating from this repository? [y/N]", type y and press Enter. This is the safest approach as you review what is changing.

If apt update isn't available or you need to automate the update, use the --allow-releaseinfo-change flag:

sudo apt-get update --allow-releaseinfo-change

This flag tells APT to automatically accept repository metadata changes. You only need to run this once; future updates will succeed.

To make this change persistent across all future updates, create or edit /etc/apt/apt.conf.d/99-allow-release-changes and add:

sudo nano /etc/apt/apt.conf.d/99-allow-release-changes

Add this line (replace Suite with the field that changed: Origin, Label, Codename, Suite, Version, or DefaultPin):

Acquire::AllowReleaseInfoChange::Suite "true";

Save and exit (Ctrl+X, then Y for yes). Now apt update will work without prompts.

If you want to know which field changed before accepting, look at the full error output. It will show something like:

Repository 'http://deb.debian.org/debian bullseye InRelease' changed its 'Suite' value from 'stable' to 'oldstable'

The field name appears in quotes. You can then use the specific flag:

sudo apt-get update --allow-releaseinfo-change-suite

Other options: --allow-releaseinfo-change-origin, --allow-releaseinfo-change-label, --allow-releaseinfo-change-version, --allow-releaseinfo-change-codename.