clusterServiceDNSMode nok (non sharding setup)

Hello

Managed to upgrade to 1.15, when trying to apply cr.yaml with

expose:
  enabled: true
  exposeType: NodePort
  clusterServiceDNSMode: External

I get the the following error

kubectl -n abc apply -f cr.yaml --dry-run=server

Error from server (BadRequest): error when creating “cr.yaml”: PerconaServerMongoDB in version “v1” cannot be handled as a PerconaServerMongoDB: strict decoding error: unknown field “spec.replsets[0].expose.clusterServiceDNSMode”

Funny thing is if I run

kubectl -n abc apply -f cr.yaml --dry-run=server –validate=false

it works ?!

→ But I would really like to know how to apply correctly.

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