ME21N--Quantity conversion error in net price calculation

Hi MM experts,

Issue: while creating PO, when attempting to add the net price for line item. but system removes the cost and gives the follow error message says "Quantity conversion error in net price calculation".

The system was not able to convert the order unit into the purchase order price unit. Possible reasons:

i) the conversion results in a net price that is too high, or

ii) the conversion factor for the units has not been properly maintained.

iii) Check whether the units of measure and their conversion factor are correct.

I have checked material master >unit of measure > 1 PL = 22 KG maintained.

Can you please tell me how to resolve this issue?

Appreciated early response.

Thanks in advance.

Suresh