There are a few key points to remember when working with backend configurations:

When the backend configuration changes, it is crucial to run terraform init. This ensures that Terraform pulls down the necessary configuration for the new backend. Failure to run terraform init may result in using the previous backend configuration.

Terraform provides an option to migrate your state when the backend changes. Although convenient, it is always recommended to manually back up your state to ensure data safety. Make a copy of the terraform.tfstate file and store it in a separate location until the migration is complete.