Not able to Make Item As Global in Approved Supplier List

Hi All

 I have created ASL , attached the Item to supplier then I set attribute Global As 'YES' and in Supplier Item Attribute i click on Create Local Button

Now it is showing Local in Supplier Item Attribute and create local button is disabled

I want to make the attribute again as Global but it is now allow me the save the changes

 Step for Reproduce this issue

• Create ASL

• Attached item

• Mentioned the supplier name for particular item

• In the Record Details Tab Set Yes in Global Parameter

• Click on Attribute

• Click on Create Local Tab

Now when i click on Global button and try to save it nothing happens