Description of the Problem

User has created a update schedule for a regionalized ROSA hosted cluster. Once the update schedule is in place when user tried to cancel the scheduled update then the backend thrown error and the same error was also reported to OCM UI. Looks like the backend call refers wrongly to non regionalized staging api not the regionalized API definition.

See the recording attached.Screen Recording 2025-01-20 at 3.48.50 PM.mov

How to reproduce

• Create a regionalized Rosa Hosted cluster at a lower version
• Go to the cluster details and then the Settings tab
• Choose "Individual Updates" and click on "Save"
• Under the "Update status" card, click on "Update" to start an upgrade and schedule it for multiple days in the future
• Once update schedule is in place, Under the "Update status" card, click on "Cancel this update"
• In the modal, click on "Cancel this update" button
• Observe the behavior

Actual results

User was unable to cancel the scheduled update due to above issue

Expected results

User should be able to cancel the scheduled update without any issue.