How to ensure cached Terraform Stack is cleared?

Summary:

New stack uses the old deleted Terraform.

Content (required):

I have a Stack that deploy a Linux server and it works well. I then delete the Stack and create a new Stack with updated Terraform. The stack runs but it uses the Terraform from the older Stack. It seems the older cached Terraform hasn't been flushed. How can I make sure this does not happen?

Version (include the version you are using, if applicable):

Terraform 0.14

Code Snippet (add any code snippets that support your topic, if applicable):