PartyHandler.jar is trying to add a duplicate plugin identifier
java.lang.IllegalStateException: Provider SpigotPluginProvider{path=plugins/MythicDungeons/PartyHandler.jar, description=org.bukkit.plugin.PluginDescriptionFile@77a1045, jarFile=java.util.jar.JarFile@3dad978d, status=null, dependencyContext=null} attempted to add duplicate plugin identifier DungeonParties v1.0-SNAPSHOT THIS WILL CREATE BUGS!!!