When creating an ImageDigestMirrorSet with conflicting mirrorSourcePolicy, it didn't prompt error.

% oc get clusterversion 
NAME      VERSION                              AVAILABLE   PROGRESSING   SINCE   STATUS
version   4.15.0-0.nightly-2024-01-14-100410   True        False         27m     Cluster version is 4.15.0-0.nightly-2024-01-14-100410

always

1. create an ImageContentSourcePolicy 

ImageContentSourcePolicy.yaml:
apiVersion: operator.openshift.io/v1alpha1
kind: ImageContentSourcePolicy
metadata:
  name: ubi8repo
spec:
  repositoryDigestMirrors:
  - mirrors:
    - example.io/example/ubi-minimal
    - example.com/example/ubi-minimal
    source: registry.access.redhat.com/ubi6/ubi-minimal
  - mirrors:
    - mirror.example.net
    source: registry.example.com/example

2.After the mcp finish updating, check the /etc/containers/registries.conf update as expected

3.create an ImageDigestMirrorSet with conflicting mirrorSourcePolicy for the same source "registry.example.com/example"

ImageDigestMirrorSet-conflict.yaml: 
apiVersion: config.openshift.io/v1
kind: ImageDigestMirrorSet
metadata:
  name: digest-mirror
spec:
  imageDigestMirrors:
  - mirrors:
    - example.io/example/ubi-minimal
    - example.com/example/ubi-minimal
    source: registry.access.redhat.com/ubi8/ubi-minimal
    mirrorSourcePolicy: AllowContactingSource
  - mirrors:
    - mirror.example.net
    source: registry.example.com/example
    mirrorSourcePolicy: NeverContactSource
   

3. create successfully, but the mcp didn't get updated and no relevant mc generated.

The machine-config-controller log showed:
I0116 02:34:03.897335       1 container_runtime_config_controller.go:417] Error syncing image config openshift-config: could not Create/Update MachineConfig: could not update registries config with new changes: conflicting mirrorSourcePolicy is set for the same source "registry.example.com/example" in imagedigestmirrorsets and/or imagetagmirrorsets

3. it should prompt: there exist conflicting mirrorSourcePolicy for the same source "registry.example.com/example" in ICSP