SkyBlock bug

[REALZulfikar]

[21:10:59] [Server thread/INFO]: Enabling SkyBlock v2.3.2
[21:10:59] [Server thread/CRITICAL]: InvalidArgumentException: "Alias "basic" is already assigned" (EXCEPTION) in "src/pocketmine/level/generator/GeneratorManager" at line 58
[21:10:59] [Server thread/DEBUG]: #0 plugins/SkyBlock.phar/src/room17/SkyBlock/generator/IsleGeneratorManager(48): pocketmine\level\generator\GeneratorManager::addGenerator(string[45] room17\SkyBlock\generator\presets\BasicIsland, string[5] basic)
[21:10:59] [Server thread/DEBUG]: #1 plugins/SkyBlock.phar/src/room17/SkyBlock/SkyBlock(71): room17\SkyBlock\generator\IsleGeneratorManager->__construct(object room17\SkyBlock\SkyBlock)
[21:10:59] [Server thread/DEBUG]: #2 src/pocketmine/plugin/PluginBase(123): room17\SkyBlock\SkyBlock->onEnable()
[21:10:59] [Server thread/DEBUG]: #3 src/pocketmine/plugin/PluginManager(588): pocketmine\plugin\PluginBase->setEnabled(boolean 1)
[21:10:59] [Server thread/DEBUG]: #4 src/pocketmine/Server(2002): pocketmine\plugin\PluginManager->enablePlugin(object room17\SkyBlock\SkyBlock)
[21:10:59] [Server thread/DEBUG]: #5 src/pocketmine/Server(1988): pocketmine\Server->enablePlugin(object room17\SkyBlock\SkyBlock)
[21:10:59] [Server thread/DEBUG]: #6 src/pocketmine/Server(2072): pocketmine\Server->enablePlugins(integer 1)
[21:10:59] [Server thread/DEBUG]: #7 src/pocketmine/command/defaults/ReloadCommand(49): pocketmine\Server->reload()
[21:10:59] [Server thread/DEBUG]: #8 src/pocketmine/command/SimpleCommandMap(270): pocketmine\command\defaults\ReloadCommand->execute(object pocketmine\command\ConsoleCommandSender, string[6] reload, array[0])
[21:10:59] [Server thread/DEBUG]: #9 src/pocketmine/Server(2029): pocketmine\command\SimpleCommandMap->dispatch(object pocketmine\command\ConsoleCommandSender, string[6] reload)
[21:10:59] [Server thread/DEBUG]: #10 src/pocketmine/Server(1616): pocketmine\Server->dispatchCommand(object pocketmine\command\ConsoleCommandSender, string[6] reload)
[21:10:59] [Server thread/DEBUG]: #11 vendor/pocketmine/snooze/src/SleeperHandler(123): pocketmine\Server->pocketmine{closure}()
[21:10:59] [Server thread/DEBUG]: #12 vendor/pocketmine/snooze/src/SleeperHandler(85): pocketmine\snooze\SleeperHandler->processNotifications()
[21:10:59] [Server thread/DEBUG]: #13 src/pocketmine/Server(2348): pocketmine\snooze\SleeperHandler->sleepUntil(double 1564089057.8941)
[21:10:59] [Server thread/DEBUG]: #14 src/pocketmine/Server(2205): pocketmine\Server->tickProcessor()
[21:10:59] [Server thread/DEBUG]: #15 src/pocketmine/Server(1784): pocketmine\Server->start()
[21:10:59] [Server thread/DEBUG]: #16 src/pocketmine/PocketMine(274): pocketmine\Server->__construct(object BaseClassLoader, object pocketmine\utils\MainLogger, string[34] /storage/emulated/0/PocketMine-MP/, string[42] /storage/emulated/0/PocketMine-MP/plugins/)
[21:10:59] [Server thread/DEBUG]: #17 (1): require(string[89] phar:///storage/emulated/0/PocketMine-MP/PocketMine-MP.phar/src/pocketmine/Pocke)

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