Paper/patches/server/0577-Remove-stale-POIs.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Shane Freeder <theboyetronic@gmail.com>
Date: Sat, 9 Jan 2021 14:17:07 +0100
Subject: [PATCH] Remove stale POIs


diff --git a/src/main/java/net/minecraft/server/level/ServerLevel.java b/src/main/java/net/minecraft/server/level/ServerLevel.java
index 00a64168592ad2c8cecb2fc844d81e47610601ad..6d635a02a12d3af0639d7afda19d5f71cf81ee44 100644
--- a/src/main/java/net/minecraft/server/level/ServerLevel.java
+++ b/src/main/java/net/minecraft/server/level/ServerLevel.java
@@ -1800,6 +1800,11 @@ public class ServerLevel extends Level implements WorldGenLevel {
             });
             optional1.ifPresent((villageplacetype) -> {
                 this.getServer().execute(() -> {
+                    // Paper start
+                    if (optional.isEmpty() && this.getPoiManager().exists(blockposition1, poiType -> true)) {
+                        this.getPoiManager().remove(blockposition1);
+                    }
+                    // Paper end
                     this.getPoiManager().add(blockposition1, villageplacetype);
                     DebugPackets.sendPoiAddedPacket(this, blockposition1);
                 });