---- Minecraft Crash Report ----
// There are four lights!

Time: 29.06.19 23:18
Description: Exception ticking world

java.util.ConcurrentModificationException
	at java.util.HashMap$HashIterator.nextNode(HashMap.java:1445)
	at java.util.HashMap$KeyIterator.next(HashMap.java:1469)
	at java.util.Collections$UnmodifiableCollection$1.next(Collections.java:1042)
	at axf.y(SourceFile:259)
	at axf.o(SourceFile:389)
	at axh.a(SourceFile:72)
	at vi.a(SourceFile:325)
	at net.minecraft.server.MinecraftServer.b(SourceFile:824)
	at ui.b(SourceFile:343)
	at net.minecraft.server.MinecraftServer.a(SourceFile:763)
	at net.minecraft.server.MinecraftServer.run(SourceFile:631)
	at java.lang.Thread.run(Thread.java:748)


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

-- Head --
Thread: Server thread
Stacktrace:
	at java.util.HashMap$HashIterator.nextNode(HashMap.java:1445)
	at java.util.HashMap$KeyIterator.next(HashMap.java:1469)
	at java.util.Collections$UnmodifiableCollection$1.next(Collections.java:1042)
	at axf.y(SourceFile:259)
	at axf.o(SourceFile:389)
	at axh.a(SourceFile:72)
	at vi.a(SourceFile:325)

-- Affected level --
Details:
	All players: 6 total; [vj['Delakruash'/112304, l='world', x=-716.30, y=68.50, z=-782.44], vj['I_QNullyzianQN_I'/130011, l='world', x=-772.51, y=69.00, z=-774.68], vj['EnotOk'/163806, l='world', x=1006.32, y=66.00, z=523.89], vj['RainbowD_Rai'/168101, l='world', x=1803.38, y=66.00, z=1197.75], vj['drummerdaniel77'/183350, l='world', x=-865.95, y=72.02, z=-775.27], vj['Nezdanchik'/183480, l='world', x=2819.05, y=80.00, z=-1739.96]]
	Chunk stats: ServerChunkCache: 10710
	Level dimension: minecraft:overworld
	Level name: world
	Level seed: -763376382498738921
	Level generator: ID 00 - default, ver 1. Features enabled: true
	Level generator options: {}
	Level spawn location: World: (36,69,-144), Chunk: (at 4,4,0 in 2,-9; contains blocks 32,0,-144 to 47,255,-129), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
	Level time: 3946477 game time, 5501446 day time
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 149265 (now: false), thunder time: 167310 (now: false)
	Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
	at net.minecraft.server.MinecraftServer.b(SourceFile:824)
	at ui.b(SourceFile:343)
	at net.minecraft.server.MinecraftServer.a(SourceFile:763)
	at net.minecraft.server.MinecraftServer.run(SourceFile:631)
	at java.lang.Thread.run(Thread.java:748)

-- System Details --
Details:
	Minecraft Version: 1.14.3
	Operating System: Linux (amd64) version 4.15.0-51-generic
	Java Version: 1.8.0_212, Oracle Corporation
	Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 346343272 bytes (330 MB) / 1487548416 bytes (1418 MB) up to 4242669568 bytes (4046 MB)
	JVM Flags: 10 total; -XX:+AggressiveOpts -XX:+UseConcMarkSweepGC -XX:+UnlockExperimentalVMOptions -XX:+UseParNewGC -XX:+ExplicitGCInvokesConcurrent -XX:+UseFastAccessorMethods -XX:+OptimizeStringConcat -XX:+UseAdaptiveGCBoundary -Xms512M -Xmx4G
	Player Count: 6 / 30; [vj['Delakruash'/112304, l='world', x=-716.30, y=68.50, z=-782.44], vj['I_QNullyzianQN_I'/130011, l='world', x=-772.51, y=69.00, z=-774.68], vj['EnotOk'/163806, l='world', x=1006.32, y=66.00, z=523.89], vj['RainbowD_Rai'/168101, l='world', x=1803.38, y=66.00, z=1197.75], vj['drummerdaniel77'/183350, l='world', x=-865.95, y=72.02, z=-775.27], vj['Nezdanchik'/183480, l='world', x=2819.05, y=80.00, z=-1739.96]]
	Data Packs: vanilla, file/customizable armor stands v2.4.0.zip (incompatible), file/multiplayer sleep v1.0.1.zip (incompatible)
	Is Modded: Unknown (can't tell)
	Type: Dedicated Server (map_server.txt)