The game crashed whilst ticking entity

I'm having the same issue

Minecraft Crash Report -------- Minecraft Crash Report ----// I'm sorry, Dave.
Time: 4/10/19 11:04 AMDescription: Ticking entity
java.lang.IllegalStateException: POI data mismatch: already registered at ev{x=-449, y=79, z=-49} at aqc.a(SourceFile:72) at aqc.a(SourceFile:43) at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184) at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) at java.util.Iterator.forEachRemaining(Iterator.java:116) at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801) at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481) at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471) at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418) at aqc.<init>(SourceFile:43) at bxt.a(SourceFile:123) at java.util.Optional.map(Optional.java:215) at bxt.a(SourceFile:122) at bxt.a(SourceFile:102) at bxt.d(SourceFile:76) at aqa.a(SourceFile:69) at aqa.a(SourceFile:65) at java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:267) at java.util.stream.IntPipeline$4$1.accept(IntPipeline.java:250) at java.util.stream.Streams$RangeIntSpliterator.forEachRemaining(Streams.java:110) at java.util.Spliterator$OfInt.forEachRemaining(Spliterator.java:693) at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481) at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471) at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418) at java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:270) at bgn$1.tryAdvance(SourceFile:164) at java.util.stream.ReferencePipeline.forEachWithCancel(ReferencePipeline.java:126) at java.util.stream.AbstractPipeline.copyIntoWithCancel(AbstractPipeline.java:498) at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:485) at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471) at java.util.stream.FindOps$FindOp.evaluateSequential(FindOps.java:152) at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.util.stream.ReferencePipeline.findFirst(ReferencePipeline.java:464) at aqa.b(SourceFile:85) at apj.b(SourceFile:49) at apj.a(SourceFile:34) at apj.a(SourceFile:19) at apo.b(SourceFile:31) at ajb.a(SourceFile:249) at java.util.LinkedHashMap$LinkedValues.forEach(LinkedHashMap.java:600) at ajb.c(SourceFile:249) at ajb.a(SourceFile:221) at ave.K(SourceFile:255) at ain.cZ(SourceFile:623) at aim.k(SourceFile:2257) at ain.k(SourceFile:479) at aib.k(SourceFile:140) at aim.h(SourceFile:2102) at ain.h(SourceFile:293) at ave.h(SourceFile:293) at vf.a(SourceFile:581) at bha.a(SourceFile:669) at vf.a(SourceFile:384) at net.minecraft.server.MinecraftServer.b(SourceFile:817) at net.minecraft.server.MinecraftServer.a(SourceFile:754) at dwy.a(SourceFile:128) at net.minecraft.server.MinecraftServer.run(SourceFile:629) 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 threadStacktrace: at aqc.a(SourceFile:72) at aqc.a(SourceFile:43) at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184) at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) at java.util.Iterator.forEachRemaining(Iterator.java:116) at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801) at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481) at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471) at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418) at aqc.<init>(SourceFile:43) at bxt.a(SourceFile:123) at java.util.Optional.map(Optional.java:215) at bxt.a(SourceFile:122) at bxt.a(SourceFile:102) at bxt.d(SourceFile:76) at aqa.a(SourceFile:69) at aqa.a(SourceFile:65) at java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:267) at java.util.stream.IntPipeline$4$1.accept(IntPipeline.java:250) at java.util.stream.Streams$RangeIntSpliterator.forEachRemaining(Streams.java:110) at java.util.Spliterator$OfInt.forEachRemaining(Spliterator.java:693) at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481) at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471) at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418) at java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:270) at bgn$1.tryAdvance(SourceFile:164) at java.util.stream.ReferencePipeline.forEachWithCancel(ReferencePipeline.java:126) at java.util.stream.AbstractPipeline.copyIntoWithCancel(AbstractPipeline.java:498) at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:485) at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471) at java.util.stream.FindOps$FindOp.evaluateSequential(FindOps.java:152) at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.util.stream.ReferencePipeline.findFirst(ReferencePipeline.java:464) at aqa.b(SourceFile:85) at apj.b(SourceFile:49) at apj.a(SourceFile:34) at apj.a(SourceFile:19) at apo.b(SourceFile:31) at ajb.a(SourceFile:249) at java.util.LinkedHashMap$LinkedValues.forEach(LinkedHashMap.java:600) at ajb.c(SourceFile:249) at ajb.a(SourceFile:221) at ave.K(SourceFile:255) at ain.cZ(SourceFile:623) at aim.k(SourceFile:2257) at ain.k(SourceFile:479) at aib.k(SourceFile:140) at aim.h(SourceFile:2102) at ain.h(SourceFile:293) at ave.h(SourceFile:293) at vf.a(SourceFile:581)
– Entity being ticked --Details: Entity Type: minecraft:villager (ave) Entity ID: 247 Entity Name: Villager Entity's Exact location: -456.50, 72.69, -33.50 Entity's Block location: World: (-457,72,-34), Chunk: (at 7,4,14 in -29,-3; contains blocks -464,0,-48 to -449,255,-33), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1) Entity's Momentum: 0.00, -0.05, 0.00 Entity's Passengers: [] Entity's Vehicle: ~_ERROR~ NullPointerException: nullStacktrace: at bha.a(SourceFile:669) at vf.a(SourceFile:384)
– Affected level --Details: Level name: David's World All players: 0 total; [] Chunk stats: ServerChunkCache: 2025 Level seed: -1061025874111487064 Level generator: ID 00 - default, ver 1. Features enabled: true Level generator options: {} Level spawn location: World: (-312,62,-26), Chunk: (at 8,3,6 in -20,-2; contains blocks -320,0,-32 to -305,255,-17), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1) Level time: 16160007 game time, 447745 day time Level dimension: 0 Level storage version: 0x04ABD - Anvil Level weather: Rain time: 115875 (now: false), thunder time: 55563 (now: false) Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: trueStacktrace: at net.minecraft.server.MinecraftServer.b(SourceFile:817) at net.minecraft.server.MinecraftServer.a(SourceFile:754) at dwy.a(SourceFile:128) at net.minecraft.server.MinecraftServer.run(SourceFile:629) at java.lang.Thread.run(Thread.java:745)
– System Details --Details: Minecraft Version: 1.14 Pre-Release 1 Operating System: Mac OS X (x86_64) version 10.14.4 Java Version: 1.8.0_74, Oracle Corporation Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation Memory: 1113448592 bytes (1061 MB) / 2046820352 bytes (1952 MB) up to 2147483648 bytes (2048 MB) JVM Flags: 8 total; -Xss1M -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M Player Count: 0 / 8; [] Data Packs: vanilla Type: Integrated Server (map_client.txt) Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.

Duplicate: https://bugs.mojang.com/projects/MC/issues/MC-147754