Can't validate v1/legacy compositions

[fernandezcuesta]

What happened?

When we try to validate a LegacyCluster composition, we end up with the following error:

[x] schema validation error acme.com/v1alpha1, Kind=XFoo, test : spec.crossplane: Invalid value: "crossplane": unknown field: "crossplane"

Because the rendered XR contains ownerReferences hanging from spec.crossplane:

apiVersion: acme.com/v1alpha1
kind: XFoo
metadata:
  name: test
spec:
  compositionUpdatePolicy: Manual
  crossplane:
    resourceRefs:
    - apiVersion: bar.baz/v1alpha1
      kind: Test
      name: resource-one
    - apiVersion: bar.baz/v1alpha1
      kind: Test
      name: resource-two
[...]

How can we reproduce it?

crossplane composition render ... | crosplane resource validate for a LegacyCluster composition.

What environment did it happen in?

• Crossplane CLI version: v2.3.2
• Platform (e.g., linux/amd64): linux/amd64
• Crossplane version (if applicable): v2.3.2