1.Put a proxy, ID is 0

2.Put another new proxy, ID is 1

3.Put the third new proxy, ID is 2

So far there seems no problem.
4.Remove any proxy(Here I removed the ID 1)

5.Put the proxy with ID 1 again

6.Put a new proxy, ID is 4

So, where is ID 3 gone?

It seems that put a proxy each time will increases the ID, even if the proxy already has an ID.

(the server constantly spamming the id 32 proxy until it breaches the size limit on proxies in question)

Also a minor enchancement, no one will notice any game-breaking bugs because of this.