What did I do wrong with my model swap?

[Zultarius]

I used an MPQ Editor to extract the creaturedisplayinfo.dbc from an already altered patch which has legion creature models in it.After that i used MyDbcEditor to swap the number and names of 1246 and 24708 then i went back to MPQ Editor deleted the old creaturedisplayinfo.dbc from that patch and added the new one i edited and closed the programme.I did double check to see if the file has saved and it did, but when i got ingame the models were unchanged.Is there something else i need to do or did I do it wrong?

Solved.