update endpoints

While making a rest call to update an endpoint, I am getting below error.

{
    "api_version": "3.1",
    "code": 500,
    "message_list": [
        {
            "details": {},
            "message": "uuid",
            "reason": "INTERNAL_ERROR"
        }
    ],
    "state": "ERROR"
}

Steps performed:

1. Make a get call to the resource UUID
2. Remove the status key blog from the body received from step 1
3. update the value key with new IP
4. update the spec_version from current set of 0 to 1
5. use this updated body to make PUT call to the resource UUID