I know the post is late but due to my inactivity I forgot about the Skyblock problem xD.
I think it would be ok to reset it since most of the players cannot access it, and it could some more Players back to the server thought.

The reset and redownload of the plugin could fix the problems.
And if the reset will happen, be sure to backup the old files , it may not work xD.

Will reset it this late night! Just finished updating the server and need to do other stuff.