---- Minecraft Crash Report ----
// Shall we play a game?

Time: 10/05/20 17:14
Description: Exception ticking world

java.lang.IllegalStateException: Tag minecraft:prevent_mob_spawning_inside used before it was bound
	at acq$a.c(SourceFile:53)
	at acq$a.a(SourceFile:64)
	at but.a(SourceFile:135)
	at cem$a.a(SourceFile:920)
	at bpf.a(SourceFile:403)
	at bpf.a(SourceFile:435)
	at bpf.a(SourceFile:326)
	at bpf.a(SourceFile:258)
	at bpf.a(SourceFile:196)
	at bpf.a(SourceFile:184)
	at yr.a(SourceFile:386)
	at yr$$Lambda$3509/1313988393.accept(Unknown Source)
	at java.util.ArrayList.forEach(ArrayList.java:1249)
	at yr.p(SourceFile:370)
	at yr.a(SourceFile:339)
	at yt.a(SourceFile:331)
	at net.minecraft.server.MinecraftServer.b(SourceFile:900)
	at net.minecraft.server.MinecraftServer.a(SourceFile:839)
	at eoa.a(SourceFile:89)
	at net.minecraft.server.MinecraftServer.run(SourceFile:698)
	at java.lang.Thread.run(Thread.java:745)


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

-- Head --
Thread: Server thread
Stacktrace:
	at acq$a.c(SourceFile:53)
	at acq$a.a(SourceFile:64)
	at but.a(SourceFile:135)
	at cem$a.a(SourceFile:920)
	at bpf.a(SourceFile:403)
	at bpf.a(SourceFile:435)
	at bpf.a(SourceFile:326)
	at bpf.a(SourceFile:258)
	at bpf.a(SourceFile:196)
	at bpf.a(SourceFile:184)
	at yr.a(SourceFile:386)
	at yr$$Lambda$3509/1313988393.accept(Unknown Source)
	at java.util.ArrayList.forEach(ArrayList.java:1249)
	at yr.p(SourceFile:370)
	at yr.a(SourceFile:339)
	at yt.a(SourceFile:331)

-- Affected level --
Details:
	All players: 1 total; [yu['J4TZplayZ'/1, l='ServerLevel[New World]', x=-69.32, y=4.00, z=-115.15]]
	Chunk stats: ServerChunkCache: 2025
	Level dimension: minecraft:overworld
	Level seed: 4725576416835098545
	Level generator options: NBT[{}]
	Level spawn location: World: (-64,4,-112), Chunk: (at 0,0,0 in -4,-7; contains blocks -64,0,-112 to -49,255,-97), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1)
	Level time: 187 game time, 187 day time
	Level name: New World
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
	Level generator: ID 01 - flat, ver 0. Features enabled: false
	Level weather: Rain time: 42144 (now: false), thunder time: 68366 (now: false)
	Known server brands: vanilla
	Level was modded: false
	Level storage version: 0x04ABD - Anvil
Stacktrace:
	at net.minecraft.server.MinecraftServer.b(SourceFile:900)
	at net.minecraft.server.MinecraftServer.a(SourceFile:839)
	at eoa.a(SourceFile:89)
	at net.minecraft.server.MinecraftServer.run(SourceFile:698)
	at java.lang.Thread.run(Thread.java:745)

-- System Details --
Details:
	Minecraft Version: 20w19a
	Minecraft Version ID: 20w19a
	Operating System: Windows 10 (amd64) version 10.0
	Java Version: 1.8.0_51, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 580345048 bytes (553 MB) / 872415232 bytes (832 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: 1 / 8; [yu['J4TZplayZ'/1, l='ServerLevel[New World]', x=-69.32, y=4.00, z=-115.15]]
	Data Packs: 
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.