reload causes create island at same position!

[BMESYH]

Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior:
Create island and reload plugin.

Expected behavior
A clear and concise description of what you expected to happen.
give one island for one player, but plugin gives one island to two or three player.

Screenshots
If applicable, add screenshots to help explain your problem.

Server Version (please complete the following information):

• paper 1.14.2 b81
• EpicSkyblock Version [use /is version] - lastest.

Additional context
Thank for very nice plugin!