fix: use proper level data for regen (#1921)

worldedit-bukkit/adapters/adapter-1_17_1/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/fawe/v1_17_R1_2/regen/PaperweightRegen.java

@@ -79,6 +79,7 @@ import java.util.Collections;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.OptionalLong;
 import java.util.Random;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.ConcurrentHashMap;
@@ -217,10 +218,10 @@ public class PaperweightRegen extends Regenerator<ChunkAccess, ProtoChunk, Level
         BiomeProvider biomeProvider = getBiomeProvider();
 
         MinecraftServer server = originalServerWorld.getCraftServer().getServer();
-        PrimaryLevelData levelProperties = (PrimaryLevelData) server.getWorldData();
+        WorldGenSettings originalOpts = originalWorldData.worldGenSettings();
-
+        WorldGenSettings newOpts = options.getSeed().isPresent()
-        WorldGenSettings newOpts = levelProperties.worldGenSettings()
+                ? originalOpts.withSeed(originalWorldData.isHardcore(), OptionalLong.of(seed))
-                .withSeed(originalWorldData.settings.hardcore(), options.getSeed());
+                : originalOpts;
         LevelSettings newWorldSettings = new LevelSettings(
                 "faweregentempworld",
                 originalWorldData.settings.gameType(),

worldedit-bukkit/adapters/adapter-1_18_2/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/fawe/v1_18_R2/regen/PaperweightRegen.java

@@ -213,10 +213,9 @@ public class PaperweightRegen extends Regenerator<ChunkAccess, ProtoChunk, Level
         BiomeProvider biomeProvider = getBiomeProvider();
 
         MinecraftServer server = originalServerWorld.getCraftServer().getServer();
-        PrimaryLevelData levelProperties = (PrimaryLevelData) server.getWorldData();
+        WorldGenSettings originalOpts = originalWorldData.worldGenSettings();
-        WorldGenSettings originalOpts = levelProperties.worldGenSettings();
         WorldGenSettings newOpts = options.getSeed().isPresent()
-                ? originalOpts.withSeed(levelProperties.isHardcore(), OptionalLong.of(seed))
+                ? originalOpts.withSeed(originalWorldData.isHardcore(), OptionalLong.of(seed))
                 : originalOpts;
         LevelSettings newWorldSettings = new LevelSettings(
                 "faweregentempworld",

worldedit-bukkit/adapters/adapter-1_19/src/main/java/com/sk89q/worldedit/bukkit/adapter/impl/fawe/v1_19_R1/regen/PaperweightRegen.java

@@ -214,10 +214,9 @@ public class PaperweightRegen extends Regenerator<ChunkAccess, ProtoChunk, Level
         PrimaryLevelData originalWorldData = originalServerWorld.serverLevelData;
 
         MinecraftServer server = originalServerWorld.getCraftServer().getServer();
-        PrimaryLevelData levelProperties = (PrimaryLevelData) server.getWorldData();
+        WorldGenSettings originalOpts = originalWorldData.worldGenSettings();
-        WorldGenSettings originalOpts = levelProperties.worldGenSettings();
         WorldGenSettings newOpts = options.getSeed().isPresent()
-                ? originalOpts.withSeed(levelProperties.isHardcore(), OptionalLong.of(seed))
+                ? originalOpts.withSeed(originalWorldData.isHardcore(), OptionalLong.of(seed))
                 : originalOpts;
         LevelSettings newWorldSettings = new LevelSettings(
                 "faweregentempworld",