default config results in a cloudformation creation error

[aaronwalker]

Am getting the following cloudformation error using the default config

CREATE_FAILED | AWS::ElastiCache::ReplicationGroup | RedisReplicationGroup | Property NumCacheCluster cannot be defined along with Properties NumNodeGroups, ReplicasPerNodeGroup or NodeGroupConfiguration

here the cfhighlander definition

  Component template: 'elasticache-redis@nocluster.snapshot', name: 'redis' do
    parameter name: 'DnsDomain', value: root_dns_domain
    parameter name: 'CacheInstanceType', value: 'cache.t2.micro'
    parameter name: 'SnapshotRetentionLimit', value: 0
  end

It works if a change

NumCacheClusters Ref(:CacheClusters)

to

NumCacheClusters FnIf(:Cluster, Ref(:CacheClusters), Ref('AWS::NoValue'))