NBT tag

[UnEnanoMas]

When I start the server, I always get that error

23:27:52 Server|CRITICAL > InvalidArgumentException: "Unknown NBT tag type 12" (EXCEPTION) in "vendor/pocketmine/nbt/src/NBT" at line 87
23:27:52 Server|CRITICAL > #0 vendor/pocketmine/nbt/src/NBTStream(187): pocketmine\nbt\NBT::createTag(integer 12)
23:27:52 Server|CRITICAL > #1 vendor/pocketmine/nbt/src/tag/CompoundTag(449): pocketmine\nbt\NBTStream->readTag(object pocketmine\nbt\ReaderTracker)
23:27:52 Server|CRITICAL > #2 vendor/pocketmine/nbt/src/ReaderTracker(47): pocketmine\nbt\tag\CompoundTag->pocketmine\nbt\tag\{closure}()
23:27:52 Server|CRITICAL > #3 vendor/pocketmine/nbt/src/tag/CompoundTag(457): pocketmine\nbt\ReaderTracker->protectDepth(object Closure)
23:27:52 Server|CRITICAL > #4 vendor/pocketmine/nbt/src/NBTStream(189): pocketmine\nbt\tag\CompoundTag->read(object pocketmine\nbt\BigEndianNBTStream, object pocketmine\nbt\ReaderTracker)
23:27:52 Server|CRITICAL > #5 vendor/pocketmine/nbt/src/tag/CompoundTag(449): pocketmine\nbt\NBTStream->readTag(object pocketmine\nbt\ReaderTracker)
23:27:52 Server|CRITICAL > #6 vendor/pocketmine/nbt/src/ReaderTracker(47): pocketmine\nbt\tag\CompoundTag->pocketmine\nbt\tag\{closure}()
23:27:52 Server|CRITICAL > #7 vendor/pocketmine/nbt/src/tag/CompoundTag(457): pocketmine\nbt\ReaderTracker->protectDepth(object Closure)
23:27:52 Server|CRITICAL > #8 vendor/pocketmine/nbt/src/NBTStream(189): pocketmine\nbt\tag\CompoundTag->read(object pocketmine\nbt\BigEndianNBTStream, object pocketmine\nbt\ReaderTracker)
23:27:52 Server|CRITICAL > #9 vendor/pocketmine/nbt/src/tag/CompoundTag(449): pocketmine\nbt\NBTStream->readTag(object pocketmine\nbt\ReaderTracker)
23:27:52 Server|CRITICAL > #10 vendor/pocketmine/nbt/src/ReaderTracker(47): pocketmine\nbt\tag\CompoundTag->pocketmine\nbt\tag\{closure}()
23:27:52 Server|CRITICAL > #11 vendor/pocketmine/nbt/src/tag/CompoundTag(457): pocketmine\nbt\ReaderTracker->protectDepth(object Closure)
23:27:52 Server|CRITICAL > #12 vendor/pocketmine/nbt/src/NBTStream(189): pocketmine\nbt\tag\CompoundTag->read(object pocketmine\nbt\BigEndianNBTStream, object pocketmine\nbt\ReaderTracker)
23:27:52 Server|CRITICAL > #13 vendor/pocketmine/nbt/src/NBTStream(111): pocketmine\nbt\NBTStream->readTag(object pocketmine\nbt\ReaderTracker)
23:27:52 Server|CRITICAL > #14 src/pocketmine/level/format/io/BaseLevelProvider(68): pocketmine\nbt\NBTStream->read(string[15683] ......Data...WanderingTraderSpawnChance...K...BorderCenterZ...........Difficulty)
23:27:52 Server|CRITICAL > #15 src/pocketmine/level/format/io/BaseLevelProvider(53): pocketmine\level\format\io\BaseLevelProvider->loadLevelData()
23:27:52 Server|CRITICAL > #16 src/pocketmine/Server(1010): pocketmine\level\format\io\BaseLevelProvider->__construct(string[27] /home/container/worlds/Try/)
23:27:52 Server|CRITICAL > #17 plugins/WorldLoader.phar/src/JackMD/WorldLoader/WorldLoader(14): pocketmine\Server->loadLevel(string[3] Try)
23:27:52 Server|CRITICAL > #18 src/pocketmine/plugin/PluginBase(116): JackMD\WorldLoader\WorldLoader->onEnable()
23:27:52 Server|CRITICAL > #19 src/pocketmine/plugin/PluginManager(552): pocketmine\plugin\PluginBase->setEnabled(boolean 1)
23:27:52 Server|CRITICAL > #20 src/pocketmine/Server(1898): pocketmine\plugin\PluginManager->enablePlugin(object JackMD\WorldLoader\WorldLoader)
23:27:52 Server|CRITICAL > #21 src/pocketmine/Server(1884): pocketmine\Server->enablePlugin(object JackMD\WorldLoader\WorldLoader)
23:27:52 Server|CRITICAL > #22 src/pocketmine/Server(1689): pocketmine\Server->enablePlugins(integer 1)
23:27:52 Server|CRITICAL > #23 src/pocketmine/PocketMine(273): pocketmine\Server->__construct(object BaseClassLoader, object pocketmine\utils\MainLogger, string[16] /home/container/, string[24] /home/container/plugins/)
23:27:52 Server|CRITICAL > #24 src/pocketmine/PocketMine(304): pocketmine\server()
23:27:52 Server|CRITICAL > #25 (11): require(string[71] phar:///home/container/PocketMine-MP.phar/src/pocketmine/PocketMine.php)```

[phoshp]

this is not a altay bug. it looks like world level.dat file was corrupted