Shift + Insert inserts 0 instead of pasting into the VNC server

When working with Linux machines / terminals, I always use Shift + Insert to paste the contents of the clipboard. I'm using the vnc visualization application to connect to my VNC server, but Shift + Insert does not work on the Linux-based VNC server. Whenever I try to do shift + Insert, it displays 0 in the terminal of the VNC server. But in other applications (such as browser, notebook, putty, etc.) on my local PC, the Shift + Insert combination works and glues the contents of the clipboard. Only with VNC, I hit this problem. How can I do the shift + Insert to paste instead of going out 0 in the VNC server?

Thanks in advance