Crashing Command blocks

My friends where messing around in some command blocks on my realms a long time ago. I'm talking 1.12 or lower (forgot which). ANYWAY, we apparently had a 1.12 (or lower) only command, so when 1.13 came out, the area those command blocks were in became a "crash zone" if that chunk loads the entire server crashes, and if your spawn point gets set there, you're not joining ever again. Anyone have a fix for this or can a mod please fix it?

(Sadly I can not get the pictures since, again, the server crashes if the chunk loads)