World Conversion from Nukkit does not work

[TGC-TECH]

Expected Behavior

I would expect it to convert the world from Nukkit 1 anvil to Nukkit 2 leveldb

Actual Behavior

The conversion process started and crashed the server prior to completion: Printed

C:\Users\tobyc\Desktop\Nukkit>java -Xms1G -Xmx1G -jar Nukkit.jar
09:42:23 [INFO ] Loading nukkit.yml ...
09:42:23 [INFO ] Loading server.properties ...
09:42:23 [INFO ] language.selected
09:42:23 [INFO ] Starting Minecraft: Bedrock Edition server version 1.14.60
09:42:23 [INFO ] This server is running Nukkit version git-99bce0b "" (API 2.0.0)
09:42:23 [INFO ] Nukkit is distributed under the GPL License
09:42:23 [INFO ] Loading recipes...
09:42:24 [INFO ] Loaded 1412 recipes.
09:42:24 [INFO ] Successfully loaded 0 resource packs
09:42:24 [WARN ] World "world" does not have a seed! Using a the name as the seed
09:42:24 [WARN ] World "nether" does not have a seed! Using a the name as the seed
09:42:24 [INFO ] Preparing level "converting"
09:42:24 [INFO ] Using 4 workers to convert
09:42:24 [INFO ] Preparing level "converting"
09:42:24 [INFO ] Using 4 workers to convert
09:42:24 [INFO ] Preparing level "nether"
09:42:25 [INFO ] 512 chunks converted
09:42:26 [INFO ] 1536 chunks converted
09:42:27 [INFO ] 2560 chunks converted
09:42:28 [INFO ] 3584 chunks converted

C:\Users\tobyc\Desktop\Nukkit>

Steps to Reproduce

Here is my world: https://drive.google.com/file/d/1eOgc52Jva4ETB315rniEz5hNN6F2yul-/view?usp=sharing

Debug information

• Debug link:
• Timings link (if relevant):

Crashdump, Backtrace or Other Files

https://hastebin.com/ededotuxuc.sql

Checklist:

• [] I included a /debugpaste link
• I made sure there aren't duplicates of this report (Use Search)
• I made sure I am using an up-to-date version of Nukkit
• I Made sure the bug/error is not caused by a plugin

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