Server Crashes

If Someone kills Someone with a Bow Server Instantly Crashes the Server
The server doens't Crash if The player dies from the Flame enchantment only if The Player gets Killed by the Arrow

LOG:

---- Minecraft Crash Report ----
// Would you like a cupcake?

Time: 1/4/18 11:10 PM
Description: Ticking entity

java.lang.NullPointerException: Ticking entity
	at ts.a(SourceFile:28)
	at ts.a(SourceFile:22)
	at ts.<init>(SourceFile:15)
	at tu.a(SourceFile:24)
	at java.util.Map.computeIfAbsent(Map.java:957)
	at tu.a(SourceFile:24)
	at tu.b(SourceFile:41)
	at qv.a(SourceFile:455)
	at zp.a(SourceFile:848)
	at aic.a(SourceFile:884)
	at qv.a(SourceFile:525)
	at aig.a(SourceFile:343)
	at aig.H_(SourceFile:264)
	at aiz.H_(SourceFile:98)
	at aqy.a(SourceFile:1570)
	at qt.a(SourceFile:705)
	at aqy.h(SourceFile:1546)
	at aqy.k(SourceFile:1428)
	at qt.k(SourceFile:538)
	at net.minecraft.server.MinecraftServer.w(SourceFile:667)
	at qe.w(SourceFile:352)
	at net.minecraft.server.MinecraftServer.v(SourceFile:592)
	at net.minecraft.server.MinecraftServer.run(SourceFile:497)
	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 ts.a(SourceFile:28)
	at ts.a(SourceFile:22)
	at ts.<init>(SourceFile:15)
	at tu.a(SourceFile:24)
	at java.util.Map.computeIfAbsent(Map.java:957)
	at tu.a(SourceFile:24)
	at tu.b(SourceFile:41)
	at qv.a(SourceFile:455)
	at zp.a(SourceFile:848)
	at aic.a(SourceFile:884)
	at qv.a(SourceFile:525)
	at aig.a(SourceFile:343)
	at aig.H_(SourceFile:264)
	at aiz.H_(SourceFile:98)
	at aqy.a(SourceFile:1570)
	at qt.a(SourceFile:705)
	at aqy.h(SourceFile:1546)

-- Entity being ticked --
Details:
	Entity Type: minecraft:arrow (aiz)
	Entity ID: 1833
	Entity Name: Arrow
	Entity's Exact location: -1080.72, 57.37, 1244.78
	Entity's Block location: World: (-1081,57,1244), Chunk: (at 7,3,12 in -68,77; contains blocks -1088,0,1232 to -1073,255,1247), Region: (-3,2; contains chunks -96,64 to -65,95, blocks -1536,0,1024 to -1025,255,1535)
	Entity's Momentum: 0.32, -0.48, -2.49
	Entity's Passengers: []
	Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
	at aqy.k(SourceFile:1428)
	at qt.k(SourceFile:538)

-- Affected level --
Details:
	Level name: world
	All players: 2 total; [qv['Flololilan'/257, l='world', x=-1081.69, y=57.00, z=1252.39], qv['Malikus'/526, l='world', x=-1080.45, y=56.00, z=1243.73]]
	Chunk stats: ServerChunkCache: 707 Drop: 0
	Level seed: -1275458134318360656
	Level generator: ID 00 - default, ver 1. Features enabled: true
	Level generator options: 
	Level spawn location: World: (192,64,236), Chunk: (at 0,4,12 in 12,14; contains blocks 192,0,224 to 207,255,239), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 4034159 game time, 427238 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 1 (now: false), thunder time: 1 (now: false)
	Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
	at net.minecraft.server.MinecraftServer.w(SourceFile:667)
	at qe.w(SourceFile:352)
	at net.minecraft.server.MinecraftServer.v(SourceFile:592)
	at net.minecraft.server.MinecraftServer.run(SourceFile:497)
	at java.lang.Thread.run(Thread.java:745)

-- System Details --
Details:
	Minecraft Version: 17w50a
	Operating System: Linux (amd64) version 4.4.26-nitradoV3-MC-1000-nH-dP-d-i
	Java Version: 1.8.0_101, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 193631152 bytes (184 MB) / 1193803776 bytes (1138 MB) up to 2863661056 bytes (2731 MB)
	JVM Flags: 2 total; -Xmx3072M -Xms256M
	IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 94
	Profiler Position: N/A (disabled)
	Player Count: 2 / 4; [qv['Flololilan'/257, l='world', x=-1081.69, y=57.00, z=1252.39], qv['Malikus'/526, l='world', x=-1080.45, y=56.00, z=1243.73]]
	Is Modded: Unknown (can't tell)
	Type: Dedicated Server (map_server.txt)