Based on the provided extracts, there isn't a direct process mentioned for undoing non-breaking schema changes once they have been made. However, you can manage how Airbyte handles these changes. By default, Airbyte ignores non-breaking changes and continues syncing. You can configure how Airbyte handles syncs when it detects non-breaking changes by editing the stream configuration. Here are the steps to review non-breaking schema changes: 1. On the [Airbyte Cloud](
http://cloud.airbyte.com/) dashboard, click
Connections and select the connection with non-breaking changes (indicated by a yellow exclamation mark icon). 2. Click
Review changes. 3. The
Refreshed source schema dialog displays the changes detected. 4. Review the changes and click
OK to close the dialog. 5. Scroll to the bottom of the page and click
Save changes. If you want to ignore any schema change, you can select the
Ignore option in the "Detect and propagate schema changes" settings. In this case, the schema you’ve set up will not change even if the source schema changes until you approve the changes manually. For more detailed information, you can refer to the [Airbyte documentation](
https://docs.airbyte.com/cloud/managing-airbyte-cloud/manage-schema-changes).