Thoroughly controlled

- Fix crash when placing empty linked controllers in lecterns Creators-of-Create#7876

Author: IThundxr

src/main/java/com/simibubi/create/content/redstone/link/controller/LecternControllerBlockEntity.java

@@ -8,6 +8,11 @@
 import com.simibubi.create.foundation.blockEntity.SmartBlockEntity;
 import com.simibubi.create.foundation.blockEntity.behaviour.BlockEntityBehaviour;
 
+import net.minecraftforge.api.distmarker.Dist;
+import net.minecraftforge.api.distmarker.OnlyIn;
+import net.minecraftforge.common.ForgeMod;
+import net.minecraftforge.fml.DistExecutor;
+
 import net.minecraft.client.Minecraft;
 import net.minecraft.core.BlockPos;
 import net.minecraft.core.Direction;
@@ -23,11 +28,6 @@
 import net.minecraft.world.level.block.state.BlockState;
 import net.minecraft.world.phys.Vec3;
 
-import net.minecraftforge.api.distmarker.Dist;
-import net.minecraftforge.api.distmarker.OnlyIn;
-import net.minecraftforge.common.ForgeMod;
-import net.minecraftforge.fml.DistExecutor;
-
 public class LecternControllerBlockEntity extends SmartBlockEntity {
 
 	private CompoundTag controllerNbt = new CompoundTag();
@@ -150,7 +150,7 @@ private void tryToggleActive() {
 
 	public void setController(ItemStack newController) {
 		if (newController != null) {
-			controllerNbt = newController.getTag();
+			controllerNbt = newController.getOrCreateTag();
 			AllSoundEvents.CONTROLLER_PUT.playOnServer(level, worldPosition);
 		}
 	}
@@ -189,7 +189,7 @@ public static boolean playerInRange(Player player, Level world, BlockPos pos) {
 
 	private ItemStack createLinkedController() {
 		ItemStack stack = AllItems.LINKED_CONTROLLER.asStack();
-		stack.setTag(controllerNbt);
+		stack.setTag(controllerNbt.copy());
 		return stack;
 	}