Remove Entity#level AT

Use an invoker for Entity#setLevel() instead

src/main/java/com/simibubi/create/foundation/mixin/accessor/EntityAccessor.java

@@ -0,0 +1,13 @@
+package com.simibubi.create.foundation.mixin.accessor;
+
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.gen.Invoker;
+
+import net.minecraft.world.entity.Entity;
+import net.minecraft.world.level.Level;
+
+@Mixin(Entity.class)
+public interface EntityAccessor {
+	@Invoker("setLevel")
+	void create$callSetLevel(Level level);
+}

src/main/java/com/simibubi/create/foundation/utility/worldWrappers/WrappedServerWorld.java

@@ -5,6 +5,8 @@ import java.util.List;
 
 import javax.annotation.ParametersAreNonnullByDefault;
 
+import com.simibubi.create.foundation.mixin.accessor.EntityAccessor;
+
 import net.minecraft.MethodsReturnNonnullByDefault;
 import net.minecraft.Util;
 import net.minecraft.core.BlockPos;
@@ -93,7 +95,7 @@ public class WrappedServerWorld extends ServerLevel {
 
 	@Override
 	public boolean addFreshEntity(Entity entityIn) {
-		entityIn.level = world;
+		((EntityAccessor) entityIn).create$callSetLevel(world);
 		return world.addFreshEntity(entityIn);
 	}
 

src/main/java/com/simibubi/create/foundation/utility/worldWrappers/WrappedWorld.java

@@ -6,6 +6,8 @@ import java.util.function.Predicate;
 
 import javax.annotation.Nullable;
 
+import com.simibubi.create.foundation.mixin.accessor.EntityAccessor;
+
 import net.minecraft.core.BlockPos;
 import net.minecraft.core.Direction;
 import net.minecraft.core.Holder;
@@ -146,7 +148,7 @@ public class WrappedWorld extends Level {
 
 	@Override
 	public boolean addFreshEntity(Entity entityIn) {
-		entityIn.level = world;
+		((EntityAccessor) entityIn).create$callSetLevel(world);
 		return world.addFreshEntity(entityIn);
 	}
 

src/main/resources/META-INF/accesstransformer.cfg

@@ -14,7 +14,6 @@ public net.minecraft.server.network.ServerGamePacketListenerImpl f_9737_ # above
 public net.minecraft.server.network.ServerGamePacketListenerImpl f_9739_ # aboveGroundVehicleTickCount
 
 public net.minecraft.world.entity.Entity f_146795_ # removalReason
-public net.minecraft.world.entity.Entity f_19853_ # level
 protected net.minecraft.world.entity.Entity m_19956_(Lnet/minecraft/world/entity/Entity;Lnet/minecraft/world/entity/Entity$MoveFunction;)V # positionRider
 public net.minecraft.world.entity.LivingEntity f_20899_ # jumping
 

src/main/resources/create.mixins.json

@@ -16,6 +16,7 @@
     "TestCommandMixin",
     "accessor.AbstractProjectileDispenseBehaviorAccessor",
     "accessor.DispenserBlockAccessor",
+    "accessor.EntityAccessor",
     "accessor.FallingBlockEntityAccessor",
     "accessor.GameTestHelperAccessor",
     "accessor.LivingEntityAccessor",