Zoho Inventory - Purchase order imports are case sensitive

Zoho Inventory - Purchase order imports are case sensitive

Hi,
I have imported my inventory items. 

When I import Purchase Orders, the system creates new items when item SKU is not exactly the same 'Case' 
eg. 
If item SKU is "ABC". I import "Abc", then a new item is created

Is there a setting to turn off Case Sensitive 'ness on item SKU's?

Thank You