issue while changing spark plugs
 

I was changing the spark plugs and coils on the 2.0T FSI engine 3 of the 4 plugs came out like normal. The 4th seems to have threading from the engine still on the plug so I was unable ti change that plug and had to put it back. Any idea how I will be able to change this plug to the new one?
https://cimg8.ibsrv.net/gimg/www.aud...08bb8fc07d.jpg
https://cimg0.ibsrv.net/gimg/www.aud...5f2a94ee5c.jpg