Running the optimize feature on a spigot 1.13.2 server, reaches 81% after about 2 days then throws an error and gets stuck on chunk 9752219/11942817

Have run this twice now, gets stuck at the same place. World is 50~ Gb in size.

Is there a way I can manually edit/bypass this, or is this something that is just unavoidable and the world is not usable on 1.13.2, because i'd rather it's the first of the two options.

Error is shown here with a lot of lines cut out because it's just the %completed message. 

https://pastebin.com/RsTkCcbV