Error in Sales Order at the time of selecting item in Sales Line (Cannot create a record in On-hand inventory (InventSum). Item number: , No.)

Hi All,

I am using Ax2009. When I am creating the Sales Order and doing select Item Id in Sales Line then for some items its throwing an error “Cannot create a record in On-hand inventory (InventSum). Item number: , No.
The record already exists.”

Please help me to come out of this problem.

Thanks & Regards

Vijay Raj Nath