Missing UUID field in attributes crash the game

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

Time: 02.04.20 18:08
 Description: Loading entity NBT

java.lang.NullPointerException: Loading entity NBT
 at lk.a(SourceFile:168)
 at ky.a(SourceFile:150)
 at aoh.a(SourceFile:119)
 at aof.a(SourceFile:185)
 at aog.a(SourceFile:106)
 at v.a(SourceFile:339)
 at aog.a(SourceFile:102)
 at ann.a(SourceFile:606)
 at bch.a(SourceFile:822)
 at yl.a(SourceFile:229)
 at anc.f(SourceFile:1616)
 at aav.a(SourceFile:308)
 at aav.a(SourceFile:127)
 at ze.c(SourceFile:111)
 at ze.b(SourceFile:63)
 at ly.a(SourceFile:230)
 at zb.c(SourceFile:171)
 at net.minecraft.server.MinecraftServer.b(SourceFile:864)
 at net.minecraft.server.MinecraftServer.a(SourceFile:791)
 at ell.a(SourceFile:128)
 at net.minecraft.server.MinecraftServer.run(SourceFile:650)
 at java.base/java.lang.Thread.run(Thread.java:832)

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

– Head –
 Thread: Server thread
 Stacktrace:
 at lk.a(SourceFile:168)
 at ky.a(SourceFile:150)
 at aoh.a(SourceFile:119)
 at aof.a(SourceFile:185)
 at aog.a(SourceFile:106)
 at v.a(SourceFile:339)
 at aog.a(SourceFile:102)
 at ann.a(SourceFile:606)
 at bch.a(SourceFile:822)
 at yl.a(SourceFile:229)

– Entity being loaded –
 Details:
 Entity Type: minecraft:player (yl)
 Entity ID: 148
 Entity Name: Heitzenberg
 Entity's Exact location: 407.50, 60.95, 493.92
 Entity's Block location: World: (407,60,493), Chunk: (at 7,3,13 in 25,30; contains blocks 400,0,480 to 415,255,495), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
 Entity's Momentum: 0.00, 0.00, 0.00
 Entity's Passengers: []
 Entity's Vehicle: ~~ERROR~~ NullPointerException: null
 Stacktrace:
 at anc.f(SourceFile:1616)
 at aav.a(SourceFile:308)
 at aav.a(SourceFile:127)
 at ze.c(SourceFile:111)
 at ze.b(SourceFile:63)
 at ly.a(SourceFile:230)

– Ticking connection –
 Details:
 Connection: ly@63011c0a
 Stacktrace:
 at zb.c(SourceFile:171)
 at net.minecraft.server.MinecraftServer.b(SourceFile:864)
 at net.minecraft.server.MinecraftServer.a(SourceFile:791)
 at ell.a(SourceFile:128)
 at net.minecraft.server.MinecraftServer.run(SourceFile:650)
 at java.base/java.lang.Thread.run(Thread.java:832)

– System Details –
 Details:
 Minecraft Version: 20w14a
 Minecraft Version ID: 20w14a
 Operating System: Windows 10 (amd64) version 10.0
 Java Version: 14, Oracle Corporation
 Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode, sharing), Oracle Corporation
 Memory: 568601256 bytes (542 MB) / 1191182336 bytes (1136 MB) up to 3221225472 bytes (3072 MB)
 CPUs: 12
 JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx3G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=16M
 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.