Change Column Headers Without automatic update in measures

Hi All, 

I have a question i was hoping someone could help me with. 

I have tables with the names as below 

I want to rename two columns to swap the data.

Currently i am referencing the data from the column Pack_9 in many measures. instead of going into each of these measures i want to rename Alc_Dip 10 to be Pack_9 as below

However when i do this the reference in my measures is automatically updated to be Pack_9NA when i want it to remain Pack_9. My question is, is there any way to stop this automatic behaviour ? 

Kind Regards, 

Dean