Aurora PostgreSQL major version upgrade

Hi - I am this article (Upgrade RDS Major Version | Terraform | HashiCorp Developer) to perform an Aurora RDS PostgreSQL major version upgrade 12.7 → 13.7

I am running into errors with the parameter group names.
Error creating DB Cluster Parameter Group: DBParameterGroupAlreadyExists: Parameter group parameter-group-cluster-dev already exists

I dont see any reference in the article to update/modify parameter groups.

I am also seeing this error message:
updating RDS Cluster (rds-aurora-cluster-dev): InvalidParameterCombination: The AllowMajorVersionUpgrade flag must be present when upgrading to a new major version.