---- Minecraft Crash Report -------- Minecraft Crash Report ----// I bet Cylons wouldn't have this problem.
Time: 17/07/19 12:38 AMDescription: Exception ticking world
java.util.ConcurrentModificationException at java.util.HashMap$HashIterator.nextNode(Unknown Source) at java.util.HashMap$KeyIterator.next(Unknown Source) at java.util.Collections$UnmodifiableCollection$1.next(Unknown Source) 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(Unknown Source)

A detailed walkthrough of the error, its code path and all known details is as follows:---------------------------------------------------------------------------------------
-- Head --Thread: Server threadStacktrace: at java.util.HashMap$HashIterator.nextNode(Unknown Source) at java.util.HashMap$KeyIterator.next(Unknown Source) at java.util.Collections$UnmodifiableCollection$1.next(Unknown Source) 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: 4 total; [vj['JJuster'/87, l='Gun', x=-880.71, y=63.00, z=-345.89], vj['ShadowFox_Owo'/88, l='Gun', x=-370.44, y=63.16, z=-471.49], vj['Nanponshki12'/119, l='Gun', x=-882.97, y=68.02, z=-251.73], vj['ph33rle55'/284, l='Gun', x=-892.15, y=63.00, z=-343.00]] Chunk stats: ServerChunkCache: 6778 Level dimension: minecraft:overworld Level name: Gun Level seed: -448130272 Level generator: ID 00 - default, ver 1. Features enabled: true Level generator options: {} Level spawn location: World: (-144,67,-256), Chunk: (at 0,4,0 in -9,-16; contains blocks -144,0,-256 to -129,255,-241), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1) Level time: 527221 game time, 1056549 day time Level storage version: 0x04ABD - Anvil Level weather: Rain time: 22882 (now: false), thunder time: 97 (now: false) Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: falseStacktrace: 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(Unknown Source)
-- System Details --Details: Minecraft Version: 1.14.3 Operating System: Windows 10 (amd64) version 10.0 Java Version: 1.8.0_171, Oracle Corporation Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation Memory: 12021327328 bytes (11464 MB) / 12769558528 bytes (12178 MB) up to 12769558528 bytes (12178 MB) JVM Flags: 2 total; -Xmx12g -Xms12g Player Count: 4 / 20; [vj['JJuster'/87, l='Gun', x=-880.71, y=63.00, z=-345.89], vj['ShadowFox_Owo'/88, l='Gun', x=-370.44, y=63.16, z=-471.49], vj['Nanponshki12'/119, l='Gun', x=-882.97, y=68.02, z=-251.73], vj['ph33rle55'/284, l='Gun', x=-892.15, y=63.00, z=-343.00]] Data Packs: vanilla Is Modded: Unknown (can't tell) Type: Dedicated Server (map_server.txt)