AWS - PostgreSQL and Aurora

We are using Terraform to deploy PostgreSQL and Aurora PostgreSQL in AWS.
This is all working fine.
However, when we try to perform any updates using Terraform (e.g. changing the Instance Class, the monitoring interval etc), Terraform drops the database and creates a new one.
Is there anyway around this at all?
We’ve tried the ‘deletion_protection’ but that doesn’t help.
We can manually change the configuration through the AWS console but that then leaves our .tfstate files out of sync.
Any help would be really appreciated.

I’ve managed to sort this out now…