Copy EAM Asset from Installed Base gives Error

Hi,

I'm trying to copy a new EAM Asset from Installed Base module.

1.Go to Oracle Installed Base Agent User > Item Instance > Item Instances
2.Query for an existing Asset, in this case: VALVE-001
3. Check the Select radio button for Asset VALVE-001
4. Select Copy Item Instance from the Action dropdown list
5. Click Go button
6. An error message appears on the top: "Error: Quantity must be a positive integer! "

How can I get rid of that error message?
All the values from VALVE-001 are pre-populated without any issues, just the error message appears on the top.

Thanks in advance!

Regards ,