I extent and point from default endpoint (version 22.200.001) of acumatica and I add new fields in the stockitem, then call the stockitem by postman to view warehousedetails(Qty on hand), getting exception message ‘GenericArguments[0], 'PX.Data.FieldNameParam', on 'PX.Data.Optional`1[Field]' violates the constraint of type 'Field'.’, but I m trying same with the default endpoint it working expected, please let me know what I did wrong by mistake. or how can I resolve it

Extended endpoint for Stockitem
