Error on a!exportDataStoreEntityToExcel customCellPositions and customCellValues

I'm using the the a!exportDataStoreEntityToExcel funtion and I'm trying to use customCellPositions and customCellValues. I always end up with the error message:

"Interface Definition: Expression evaluation error: An error occurred while executing a smart service: Custom cell positions can’t refer to cells below the starting cell. Otherwise, they would be overwritten by data being exported. (APNX-1-4505-037)"

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