---- Minecraft Crash Report ----
// Everything's going to plan. No, really, that was supposed to happen.

Time: 7/31/20 4:18 PM
Description: Exception in server tick loop

java.lang.IllegalStateException: Unregistered dimension type: cgy@6a0c2fa5
	at net.minecraft.server.MinecraftServer.a(SourceFile:407)
	at net.minecraft.server.MinecraftServer$$Lambda$4180/923620060.get(Unknown Source)
	at java.util.Optional.orElseThrow(Optional.java:290)
	at net.minecraft.server.MinecraftServer.a(SourceFile:407)
	at net.minecraft.server.MinecraftServer.l_(SourceFile:333)
	at emv.d(SourceFile:68)
	at net.minecraft.server.MinecraftServer.w(SourceFile:646)
	at net.minecraft.server.MinecraftServer.a(SourceFile:255)
	at net.minecraft.server.MinecraftServer$$Lambda$4031/993458352.run(Unknown Source)
	at java.lang.Thread.run(Thread.java:745)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- System Details --
Details:
	Minecraft Version: 1.16.2 Pre-release 1
	Minecraft Version ID: 1.16.2-pre1
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.8.0_51, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 1185240616 bytes (1130 MB) / 2147483648 bytes (2048 MB) up to 2147483648 bytes (2048 MB)
	CPUs: 4
	JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
	Player Count: 0 / 8; []
	Data Packs: vanilla, file/crash
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.