How do you handle a Instance: DBInstanceAlreadyExists Error with RDS Aurora

I have somehow created a mismatch between my Terraform config and my AWS RDS instances and now when applying a change to the environment I always get the following error.

Instance: DBInstanceAlreadyExists: DB instance already exists
│       status code: 400, request id: c64d6667-33b3-4b21-9d39-e75ac6b87633

Is there a way to ignore these errors if the instance already exists and just continue on applying other changes?

This is my definition for the RDS instance.

resource "aws_rds_cluster_instance" "default" {
  count                        = 1
  cluster_identifier           =
  identifier                   = "${var.environment}-dfs-${count.index}"
  publicly_accessible          = true
  performance_insights_enabled = true

  instance_class = var.database.instance_type
  engine         = aws_rds_cluster.default.engine
  engine_version = aws_rds_cluster.default.engine_version

  db_subnet_group_name = var.database.subnet_group


    aws = {
      source  = "hashicorp/aws"
      version = "~> 3.0"

Terraform version: v1.3.3