BAPI Material Save isuue -first specify main EAN for EA ?

Hi Experts,

I am facing an issue while updating a material from .NET using BAPI_MATERIAL_SAVEDATA, I am passing below parameters to BAPI.

INTERNATIONALARTNOS

EAN_CAT: CQ

EAN_UPC: 6900320018997

UNIT:EA

UNITSOFMEASURE:

EAN_UPC:6900320018997

EAN_CAT:UC

ALT_UNIT: EA

UNITSOFMEASUREX:

EAN_UPC: X

EAN_CAT: X

ALT_UNIT: EA

and I am facing an error saying that 'First specify the main EAN for the unit EA'.

Can you help on this ??