In a disconnected OCP cluster, with CNV installed, and golden images enabled, the CDIDataImportCronOutdated alert is constantly firing, because some (or all) of the imported images are not getting mirrored into the disconnected env. This is by design, as these images are not built or owned by the OpenShift Virtualization team. The solution is to disable the mirroring OR to have the customer manually mirror the to be imported images into the disconnected cluster.

Modifying a common dataImportCronTemplate (e.g its source registry url like we need here) is detailed in upstream HCO doc but not in OCP 4.12 doc.