[Bug] - Terminating existing database EBS volume on updating database AMI through terraform

[somnathpawar]

Describe the bug
I am using current Terraform IaC code provided on https://github.com/kasmtech/terraform/blob/develop/aws/multi_region/README.md. It creates the database container and other resources on applying the code on AWS. The issues is, when I tried changing AMI for db instance, it seems deleting the root volume too. So all the configuration I created through admin portal are getting vanished. Shouldn't the db volume retained while upgrade and attach to the new replacement instance?

To Reproduce
Steps to reproduce the behavior:

1. Apply Terraform Iac Code https://github.com/kasmtech/terraform/tree/develop/aws/multi_region
2. Once set up is done, try changing the AMI of DB instance
3. It will terminate the old instance and create new one. But it will also delete the EBS volume and all the earlier configuration done in the portal.

Expected behavior
DB volume should be retained and attached to the new replaced instance so configuration and all the data will be there.

Workspaces Version
e.g Version 1.16.1

Workspaces Installation Method
e.g Multi-region, Multi-Server, terraform