InvalidParameterCombination - The request must contain a modification to the ipam pool

[Kim]

Hi,
Trying to do an IPv6 setup in ipam. However after an initial deploy, whatever I try to update, I get the error
InvalidParameterCombination - The request must contain a modification to the ipam pool

`

module "ipv6_aws" {
  source  = "aws-ia/ipam/aws"
  version = "~> 2.0"

  top_name                  = "AWS public IPv6 pool"
  top_netmask_length        = "52"
  address_family            = "ipv6"
  ipam_scope_type           = "public"
  top_aws_service           = "ec2"
  top_publicly_advertisable = true
  top_public_ip_source      = "amazon"
  top_locale                = "eu-central-1"

  pool_configurations = {
    eu-central-1 = {
      name                  = "AWS public IPv6 pool eu-central-1"
      description           = "Pool for ipv6 eu-central-1"
      netmask_length        = "53"
      locale                = "eu-central-1"
      aws_service           = "ec2"
      public_ip_source      = "amazon"

    sub_pools = {
      lab = {
        name                  = "AWS public IPv6 pool eu-central-1 lab"
        netmask_length        = "55"
        aws_service           = "ec2"
        ram_share_principals  = ["arn:aws:organizations::xxxxxxxxxxxxx:ou/o-xxxxxx/ou-xxxx-xxxxxx"]
        public_ip_source      = "amazon"
      }
      nprd = {
        name                  = "AWS public IPv6 pool eu-central-1 nprd"
        netmask_length        = "55"
        aws_service           = "ec2"
        ram_share_principals  = ["arn:aws:organizations::xxxxxxxxxxxxx:ou/o-xxxxxxxx/ou-xxxx-xxxxxxxxx"]
        public_ip_source      = "amazon"
      }
      #prod = {
      #  name                  = "AWS public IPv6 pool eu-central-1 prod"
      #  netmask_length        = "55"
      #  aws_service           = "ec2"
      #  ram_share_principals  = ["arn:aws:organizations::xxxxxxxxxxxxx:ou/o-xxxxxxxx/ou-xxxx-xxxxxxxxx"]
      #  public_ip_source      = "amazon"
      #}
    }
  }
  eu-west-1 = {
    name                  = "AWS public IPv6 pool eu-west-1"
    description           = "Pool for ipv6 eu-west-1"
    netmask_length        = "53"
    locale                = "eu-west-1"
    aws_service           = "ec2"
    public_ip_source      = "amazon"

    sub_pools = {
      lab = {
        name                  = "AWS public IPv6 pool eu-west-1 lab"
        netmask_length        = "55"
        aws_service           = "ec2"
        ram_share_principals  = ["arn:aws:organizations::xxxxxxxxxxxxx:ou/o-xxxxxxxx/ou-xxxx-xxxxxxxx"]
        public_ip_source      = "amazon"
      }
      nprd = {
        name                  = "AWS public IPv6 pool eu-west-1 nprd"
        netmask_length        = "55"
        aws_service           = "ec2"
        ram_share_principals  = ["arn:aws:organizations::xxxxxxxxxxxxx:ou/o-xxxxxxxx/ou-xxxx-xxxxxxxxx"]
        public_ip_source      = "amazon"
      }
      #prod = {
      #  name                  = "AWS public IPv6 pool eu-west-1 prod"
      #  netmask_length        = "55"
      #  aws_service           = "ec2"
      #  ram_share_principals  = ["arn:aws:organizations::xxxxxxxxxxxxx:ou/o-xxxxxxxx/ou-xxxx-xxxxxxxxx"]
      #  public_ip_source      = "amazon"
      #}
      }
    }
  }
}

`
(using TF version v1.6.4)

If for example I try to create eu-central-1 first and after deploy eu-west-1, it fails with that error.
if I try to deploy everything except prod and deploy prod later, it fails with that error.
If I try to add RAM shares later, fails with that error.

Am I missing something? variables? I don't immediately see what could cause this.

Thanks in advance

Kr