Characters Invalid IDs

[StaryniteLights2]

I have made a private server with some custom npcs on it. I didn't like the names nor the IDs, so I changed them. I changed the IDs to something short and simple, example; 4,5,6,7,8, ect. It use to be something long like 800023. Then I changed the names to something more unique, like Swamptooth and Parry Krawter. The first problem I had was I changed all of this for each npc, went in game, and the ids were still there with their original names. They were still summonable though. So I restarted my server and closed the exes and restarted my computer. When I came back the ids and names were changed, but when i try to summon them, an error says; Invalid ID or whatever. So I just restarted my server and closed the exes, but the problem still occurs. What can I do?

[Ground Zero]

You forgot to change the ID of the Creature_proto of that NPC too.