Crash Report

---- Minecraft Crash Report ----
// Why did you do that?

Time: 3/31/18 12:04 PM
Description: Ticking entity

java.lang.ClassCastException: afn cannot be cast to afj
	at adb.a(SourceFile:41)
	at acz.a(SourceFile:22)
	at adl.a(SourceFile:94)
	at abw.cL(SourceFile:644)
	at abv.l(SourceFile:1895)
	at abw.l(SourceFile:504)
	at ajs.l(SourceFile:33)
	at aki.l(SourceFile:257)
	at abv.S_(SourceFile:1750)
	at abw.S_(SourceFile:284)
	at ajs.S_(SourceFile:38)
	at aki.S_(SourceFile:232)
	at ajg.S_(SourceFile:252)
	at aug.a(SourceFile:1617)
	at se.a(SourceFile:705)
	at aug.h(SourceFile:1593)
	at aug.p_(SourceFile:1475)
	at se.p_(SourceFile:538)
	at net.minecraft.server.MinecraftServer.w(SourceFile:702)
	at rp.w(SourceFile:354)
	at net.minecraft.server.MinecraftServer.v(SourceFile:627)
	at net.minecraft.server.MinecraftServer.run(SourceFile:532)
	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 thread
Stacktrace:
	at adb.a(SourceFile:41)
	at acz.a(SourceFile:22)
	at adl.a(SourceFile:94)
	at abw.cL(SourceFile:644)
	at abv.l(SourceFile:1895)
	at abw.l(SourceFile:504)
	at ajs.l(SourceFile:33)
	at aki.l(SourceFile:257)
	at abv.S_(SourceFile:1750)
	at abw.S_(SourceFile:284)
	at ajs.S_(SourceFile:38)
	at aki.S_(SourceFile:232)
	at ajg.S_(SourceFile:252)
	at aug.a(SourceFile:1617)
	at se.a(SourceFile:705)
	at aug.h(SourceFile:1593)

-- Entity being ticked --
Details:
	Entity Type: minecraft:drowned (ajg)
	Entity ID: 317
	Entity Name: Drowned
	Entity's Exact location: 686.31, 60.98, -259.70
	Entity's Block location: World: (686,60,-260), Chunk: (at 14,3,12 in 42,-17; contains blocks 672,0,-272 to 687,255,-257), Region: (1,-1; contains chunks 32,-32 to 63,-1, blocks 512,0,-512 to 1023,255,-1)
	Entity's Momentum: 0.00, 0.00, 0.00
	Entity's Passengers: []
	Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
	at aug.p_(SourceFile:1475)
	at se.p_(SourceFile:538)

-- Affected level --
Details:
	Level name: The fgts
	All players: 1 total; [sg['DarkFHunter'/174, l='The fgts', x=691.72, y=63.00, z=-245.87]]
	Chunk stats: ServerChunkCache: 697 Drop: 0
	Level seed: -3467381072481467755
	Level generator: ID 00 - default, ver 1. Features enabled: true
	Level generator options:
	Level spawn location: World: (50,64,235), Chunk: (at 2,4,11 in 3,14; contains blocks 48,0,224 to 63,255,239), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 722393 game time, 741947 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 60375 (now: false), thunder time: 7591 (now: false)
	Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
	at net.minecraft.server.MinecraftServer.w(SourceFile:702)
	at rp.w(SourceFile:354)
	at net.minecraft.server.MinecraftServer.v(SourceFile:627)
	at net.minecraft.server.MinecraftServer.run(SourceFile:532)
	at java.lang.Thread.run(Unknown Source)

-- System Details --
Details:
	Minecraft Version: 18w11a
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.8.0_161, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 1519066336 bytes (1448 MB) / 2058354688 bytes (1963 MB) up to 2058354688 bytes (1963 MB)
	JVM Flags: 2 total; -Xmx2048M -Xms2048M
	Profiler Position: N/A (disabled)
	Player Count: 1 / 2; [sg['DarkFHunter'/174, l='The fgts', x=691.72, y=63.00, z=-245.87]]
	Data Packs: vanilla
	Is Modded: Unknown (can't tell)
	Type: Dedicated Server (map_server.txt)