REST API ElementEntries getting response: Updating date effective attribute is not allowed.

Summary:

Full response message Updating date effective attribute is not allowed. Please remove following attribute from payload: EffectiveStartDate

I don't understand this response message. The API documentation states that EffectiveStartDate and EffectiveEndDate are required, and this person does not already have an element entry for this element type effective within these dates.

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Code Snippet (add any code snippets that support your topic, if applicable):

{   "PersonId": 300000506099419,   "ElementTypeId": 300000010945658,   "AssignmentId": 300000533548751,   "EntryType": "E",   "CreatorType": "H",   "EntrySequence": 202408130916,   "EffectiveStartDate": "2024-08-25",   "EffectiveEndDate": "2024-09-07",     "elementEntryValues": [   {     "InputValueId": 300000010945986,     "ScreenEntryValue": "500"   } ]}