BAPI_PR_CREATE Error 06 411 Sum of quantities > &< larger than total quantity

Dear SAP Experts,

I am in the middle of testing BAPI_PR_CREATE and got stucked with this error message. I have entered the quantity in PRITEM as 1.000.

However it stated the error - Sum of quantities > 2.000 < larger than total quantity.

Some of the solutions I found was to reduce the quantity in account assignment items, however even if I set the value to 0, the account assignment's quantity will pick up the same amount as the one I entered in PRITEM.

Entry

Result

Any idea what might have caused the error?