ProductGroups - mandatory fields
When creating or amending a product group, a value must be supplied for:
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Product Group Code - payload element <ProductGroupCode>
 
When creating product group assign conversions, a value must be supplied for:
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Conversion Id - payload element <ProdGrpConv_ConvId>
 
When creating or amending a product group unit labels, a value must be supplied for:
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Unit Label Code - payload element <UnitLabelCode>