Change UOM of Item in some transactions by SQL

Hi everyone. I can change UOM of an item that is in Nos for Unit. I have some transactions completed. The possibility I have found is by SQL, but I do not know if this would affect another part of the system.Does anybody have any suggestions

Yah,it will affected in another transactions.
Have you used any UOM conversion? if yes, then definitely it will affect.

I understand. I have solved it using patches