From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Thu, 19 Jul 2018 01:08:05 -0400
Subject: [PATCH] Re-add vanilla entity warnings for duplicates

These are a critical sign that somethin went wrong, and you've lost some data....

We should kind of know about these things you know.

diff --git a/src/main/java/net/minecraft/server/level/WorldServer.java b/src/main/java/net/minecraft/server/level/WorldServer.java
index eb909ef3a34045480034bd7d7f3e5ac674f664b5..4d3e3a4496ab28e0865f2ad871915fcb2ae57e36 100644
--- a/src/main/java/net/minecraft/server/level/WorldServer.java
+++ b/src/main/java/net/minecraft/server/level/WorldServer.java
@@ -1075,7 +1075,7 @@ public class WorldServer extends World implements GeneratorAccessSeed {
         if (entity1 == null) {
             return false;
         } else {
-            // WorldServer.LOGGER.warn("Trying to add entity with duplicated UUID {}. Existing {}#{}, new: {}#{}", uuid, EntityTypes.getName(entity1.getEntityType()), entity1.getId(), EntityTypes.getName(entity.getEntityType()), entity.getId()); // CraftBukkit
+            WorldServer.LOGGER.warn("Trying to add entity with duplicated UUID {}. Existing {}#{}, new: {}#{}", uuid, EntityTypes.getName(entity1.getEntityType()), entity1.getId(), EntityTypes.getName(entity.getEntityType()), entity.getId()); // CraftBukkit // Paper
             return true;
         }
     }