Minecraft The received string length is longer than maximum allowed (23> 16)? Remedy?

I have the problem that this problem is always displayed

I entered / scoreboard objective remove credit and it was gone.

So when I was new to the world it was back.

That means something in your scoreboard is longer than 16 characters. Also happens in the tray list or in the name above the entities, e.g. If the prefixes are too long!