Is any way to do this.
I have open Item 0000005 ,then I click on Item reference action.It will open item reference page.
On that page ,I have enter the Reference type as ::Barcode & enter reference no:1234.Then,
I have open Item 0000006 ,then I click on Item reference action.It will open item reference page.
On that page ,I have enter the Reference type as ::Barcode & again enter same reference no:1234
Now that time it shows an error message: 'The Reference no is already exist for another item,