Insert/Update issue

[junaid04]

i am facing issue in insert and update don't know why some time it inserted data on same model but once data is inserted unable new data is not inserted or existing data is not updating. Data which is not inserted intoEntry it have about 19000 record if it was the reason then please let me know how to handle large number of records I am using sync version 6.0.3

//JSON
{
    "deviceId": "154",
    "fieldId": "uuid",
    "farmId": "uuid",
    "companyId": "uuid",
    "points": [
        {
            "ts": 1614091886000,
            "v": {
                "cv": 0.1,
                "sr": 1
            },
            "b": 3281,
            "s": 5
        }
    ]
}

remoteKey is deviceId and and ts.

[junaid04]

@3lvis can you please let me know how to insert new record into relationship. I have added insert and insertrelationship operation first time data is saved into coredata but when update data is received it is not saving to coredata.