After changing the Terraform files by hand, I realized that I have Terraform resources created on AWS.
But I can't do a terraform destroy -auto-approve, because the existing Terraform files are still there, and there's conflicts in the definition that I can't resolve.
So, I moved the Terraform files away, and started with no files, then used the following commands:
In 2017, with the release of Delphi 10.2 Tokyo, Embarcadero introduced a specialized implementation of the Observer pattern into the System.Classes unit. While it has been in the wild for 9 years, it remains a "hidden" architecture for many, primarily because it serves as the invisible engine behind LiveBindings. Other than live bindings, you can also use the Observer pattern as a way to update component settings to the Windows registry, an .ini file, or persist it elsewhere.
System.Classes