Hello again! Back with how everything ended in case anyone got the same error.
We talked to the support team of our server provider and they decided to move our data and change our IP. I guess that kinda changes the hardware too? Again, I dont have much idea about all of this and the support team didnt explain it either. Anyway, they did that and problem solved. Im guessing they moved our minecraft server to another host with more space or something.
Best of all, we can keep playing our world! I dont know if the corruption is not game breaking or if its something that we will have to deal with down the line, but as of right now, no problem at all.
Thanks again for the help!