Change Base Unit of Measure from PCS to GMS

Hi

I am using Nav 2009 R2 and find below an example of item I have in the item card:

ITEM NAME : Dates 500gm Base Unit of Measure : PCS

However now I could like to change the Base Unit of Measure from PCS to GMS

When I try to change it shows the below error: You cannot change Base of unit Measure because there are one or more open ledger entries for this item.

How can I change the Base Unit of Measure? Kindly help

Thanks

Hi,

Message state itself that if Item have inventory then you can not change the unit of measure

For this first you need make inventory to zero then change the unit of measure

OR

Create new item and transfer the inventory from old item and block the old item.