API v3 error 500 after PC reinstallation

Hello
after reinstalling Prism Central (PC) from v.5.16.1.3 to v5.17.1.1, using the procedure for unregistering PC

Unregistering cluster from PC
https://portal.nutanix.com/page/documents/details?targetId=Prism-Central-Guide-Prism-v5_5:mul-vcenter-server-unregister-pc-t.html

we have some strange issues:


- A PC REST API query return 2 available cluster (one for PE and one for PC, with different uuid on metadata)

It is normal for API 3.1?

 

- On Nutaniy API Explorer a simle query of vms "POST /vms/list"

With small payload for "get_entities_request"

{
  "kind": "vm",
  "length": 10,
  "offset": 0
}

returns
 

{
  "api_version": "3.1",
  "code": 500,
  "message_list": [
    {
      "message": "Internal Server Error. Failed to get schema for cluster 000597eb-aa13-1c72-0000-000000029cf0",
      "reason": "INTERNAL_ERROR"
    }
  ],
  "state": "ERROR"
}

Where the displayed uuid is the correct PE cluster uuid.

This is a lab cluster, then we have just one culster with < 50 Vms

Any suggestion?

Thanks