Air Venturi Air Venturi degassing port leak

Good afternoon,
I have a Air Venturi Avenger which was my 1st PCP. I have had a lot of fun with this rifle but it has developed a small leak. Using the soapy water trick I found that the leak is at the degassing valve. I degassed the gun and took the needle out of the port to look for anything that might be causing the leak. The port was clean. I then recharged the gun and still have the leak.

The gun is over 1 year old so it’s out of warranty. Any suggestions will be much appreciated!