[Using setBlock with a stair BlockState places its full-block version instead of the stair version.]

found the problem.

the BlueStair was copying properties from the WallpaperStair, and the WallpaperStair was copying properties from WallpaperBlock, so when I right-clicked the stair, it was doing what the wallpaperblock was doing

[Using setBlock with a stair BlockState places its full-block version instead of the stair version.]

i think it might be a problem with how im creating the block
 

	// blue
	public static final RegistryObject<wallpaperstairs> BLUE_STAIR = BLOCKS.register("blue_stair", () -> 
	new wallpaperstairs(BlockInit.WALLPAPER_BLOCK.get().defaultBlockState(), Block.Properties.copy(BlockInit.WALLPAPER_BLOCK.get())));

however when i change the BlockInit.WALLPAPER_BLOCK to WALLPAPER_STAIR (which is a stair block, the one that is supposed to change into the blue stair) it does the same thing
(heres the wallpaper stair)
 

	public static final RegistryObject<wallpaperstairs> WALLPAPER_STAIR = BLOCKS.register("wallpaper_stair", () -> 
	new wallpaperstairs(BlockInit.WALLPAPER_BLOCK.get().defaultBlockState(), Block.Properties.copy(BlockInit.WALLPAPER_BLOCK.get())));

 

[Using setBlock with a stair BlockState places its full-block version instead of the stair version.]

just renamed them thankyou for the tip

[Using setBlock with a stair BlockState places its full-block version instead of the stair version.]

			if (item.is(ItemInit.BLUE_PAINTBRUSH.get())) {
				p_60506_.swing(p_60507_);
				BlockState blockstate = BlockInit.BLUE_STAIR.get().defaultBlockState();
				PaintStair(p_60503_, p_60504_, p_60505_, blockstate, p_60506_);
			}

heres the PaintStair method I made:
 

	static void PaintStair (BlockState p_60503_, Level p_60504_, BlockPos p_60505_, BlockState blockstate, Player p_60506_) {
		p_60504_.setBlock(p_60505_, blockstate, blockstate.getHarvestLevel()); 
	}

and here is the stair in BlockInit
 

	public static final RegistryObject<wallpaperstairs> BLUE_STAIR = BLOCKS.register("blue_stair", () -> 
	new wallpaperstairs(BlockInit.WALLPAPER_BLOCK.get().defaultBlockState(), Block.Properties.copy(BlockInit.WALLPAPER_BLOCK.get())));

 

[Using setBlock with a stair BlockState places its full-block version instead of the stair version.]

To get the blockstate of the stair, I am just using .get() and then .defaultBlockState()

BlockState blockstate = BlockInit.BLUE_STAIR.get().defaultBlockState();

I did hear about a method that does give you the full-block version of a stair blockstate, but I do not believe I am using that method.

[Errors in currently selected datapacks prevented the world from loading]

I tried adding tags to my mod, and when I ran the client, this appears whenever I want to create a world or play a previously made world.
Log:

https://gist.github.com/orangejuice21314/ad87b0fd0d553f0c78a0cc8bc70263f8

Tag creation:
 

public class mzojPaintTags {
	
	public static class Items {
		
		//paint brushes
		public static final Tags.IOptionalNamedTag<Item> PAINT_BRUSHES = createTag("paint_brushes");
	
		//buckets
		public static final Tags.IOptionalNamedTag<Item> PAINT_BUCKETS = createTag("paint_buckets");
				
		private static Tags.IOptionalNamedTag<Item> createTag(String name) {
			return ItemTags.createOptional(new ResourceLocation(Main.MOD_ID, name));
		}
		
		private static Tags.IOptionalNamedTag<Item> createForgeTag(String name) {
			return ItemTags.createOptional(new ResourceLocation("forge", name));
		}
	}
	
}

Setting blocks to tag:
 

{
	"replace":false,
	"values": [
		"mzojPaint:red_paintbrush",
		"mzojPaint:white_paintbrush"
	]
}