11 minutes ago, samjviana said:

I think that those "Item" Registry Entries aren't even necessary, you could subscribe the RegistryEvent.Register<Item> and them register an BlockItem for those Blocks, unlesse you need something specific.

Almost certainly true.

3 minutes ago, Draco18s said:

Almost certainly true.

Maybe he could do something like this, if i'm not mistaken:

@SubscribeEvent
    public static void onRegisterItem(final RegistryEvent.Register<Item> event) {
        final IForgeRegistry<Item> registry = event.getRegistry();

        ModBlocks.BLOCKS.getEntries().stream().map(RegistryObject::get).forEach(block -> {
            if (!isInFilter(block)) {
                return;
            }
            else {
		final BlockItem blockItem = new BlockItem(block, properties);
    
                blockItem.setRegistryName(block.getRegistryName());
                registry.register(blockItem);
            }
        });
    }

 

2 minutes ago, diesieben07 said:

They are already doing that.

oh, my bad ... didn't see that XD
them he could just delete those entries, no?