ShamrockBuilds

When I try to join my server it displays the message below. I have no mods installed but I get the message regardless. I think it is to do with forge updating from 36.0.45 to 36.0.46. The world / server was saved on forge 36.0.45 and when it was opened again, it opened to forge 36.0.46 so it can't load correctly. It does mention that this is a problem on my Aternos log page and a solution is to change forge from 36.0.46 back to 36.0.45. I would be happy to do this but it sends me to the Aternos page showing the different versions of forge available. Since 36.0.45 to 36.0.46 is such a small update it is not listed (well I presume this) and instead gave me a link to this website. I did some exploring and found this "forum"? I know very little about this kind of thing and I am doing a lot of speculation. If I could be shown how to revert back to 36.0.45 (if this is even the actual problem in the first place) I would be very grateful. This is a screenshot of the Aternos log and the message I get when I try to log into my server.