Issue Description: Dynmap is trying to create new tables in database after server restart. I tried MySQL Server 5.7 and MySQL Server 8.0 as well.

• Dynmap Version: Dynmap-3.1-spigot.jar
• Server Version: *Yatopia 1.16.5 *
• Pastebin of Configuration.txt: https://pastebin.com/VxdmasjK
• Server Host (if applicable): Fakaheda.eu
• Steps to Replicate:
  1) Connect Dynmap on MySQL
  2) Start server
  3) After loading.. Restart server
  4) Voilá replicated.
  

[X] I have looked at all other issues and this is not a duplicate
[X] I have been able to replicate this

That could be any possible issue:

• the mysql-login-information are set wrong in the configuration.txt
• the user you set up in the configuration.txt has not the permission to manage the dynmap Database.
• the issue literally set "the table already exists", so it tried to create the table, but it is already there. -> We don't know how your database looks like, but i consider that there are tables he wants to use, but they're already there.
• and so on...

I'm really confused, cause I tried to replicate the error, but it did not occur on my system.
The most possible issue can be, that the plugin does not like prefixes in the db-tables - got this error a while ago. Deleted the prefixes and Voilá it worked, instant.

Hope my comment helps - if I missed a detail, please mention it
thx