Ticking Entity Crash

[17:10:14] [Server thread/ERROR]: Encountered an unexpected exception
m: Ticking entity
at net.minecraft.server.MinecraftServer.b(SourceFile:839) ~[server.jar:?]
at uk.b(SourceFile:343) ~[server.jar:?]
at net.minecraft.server.MinecraftServer.a(SourceFile:774) ~[server.jar:?]
at net.minecraft.server.MinecraftServer.run(SourceFile:642) [server.jar:?]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_202]
Caused by: java.lang.ClassCastException: axw cannot be cast to aix
at amy.a(SourceFile:36) ~[server.jar:?]
at aot.a(SourceFile:22) ~[server.jar:?]
at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:174) ~[?:1.8.0_202]
at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175) ~[?:1.8.0_202]
at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175) ~[?:1.8.0_202]
at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175) ~[?:1.8.0_202]
at java.util.Iterator.forEachRemaining(Iterator.java:116) ~[?:1.8.0_202]
at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801) ~[?:1.8.0_202]
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481) ~[?:1.8.0_202]
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471) ~[?:1.8.0_202]
at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) ~[?:1.8.0_202]
at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) ~[?:1.8.0_202]
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:1.8.0_202]
at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418) ~[?:1.8.0_202]
at anf.a(SourceFile:69) ~[server.jar:?]
at aiy.dc(SourceFile:623) ~[server.jar:?]
at aix.k(SourceFile:2266) ~[server.jar:?]
at aiy.k(SourceFile:487) ~[server.jar:?]
at aix.h(SourceFile:2111) ~[server.jar:?]
at aiy.h(SourceFile:294) ~[server.jar:?]
at arf.h(SourceFile:259) ~[server.jar:?]
at vk.a(SourceFile:583) ~[server.jar:?]
at bhr.a(SourceFile:675) ~[server.jar:?]
at vk.a(SourceFile:386) ~[server.jar:?]
at net.minecraft.server.MinecraftServer.b(SourceFile:835) ~[server.jar:?]
... 4 more
[17:10:14] [Server thread/ERROR]: This crash report has been saved to: /usr/home/centural/Survival/./crash-reports/crash-2019-07-30_17.10.14-server.txt
[17:10:14] [Server thread/INFO]: Stopping server
[17:10:14] [Server thread/INFO]: Saving players
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1. A fatal error has been detected by the Java Runtime Environment:
   #
2. SIGSEGV (0xb) at pc=0x0000000801e13734, pid=25640, tid=0x0000000000018ac3
   #
3. JRE version: OpenJDK Runtime Environment (8.0_202-b08) (build 1.8.0_202-b08)
4. Java VM: OpenJDK 64-Bit Server VM (25.202-b08 mixed mode bsd-amd64 compressed oops)
5. Problematic frame:
6. j agu.ax()Z+0
   #
7. Core dump written. Default location: /usr/home/centural/Survival/java.core
   #
8. An error report file with more information is saved as:
9. /usr/home/centural/Survival/hs_err_pid25640.log
   Compiled method (c1) 81947169 16153 3 ke::a (23 bytes)
   total in heap [0x0000000803f8f8d0,0x0000000803f91218] = 6472
   relocation [0x0000000803f8f9f8,0x0000000803f8fb18] = 288
   main code [0x0000000803f8fb20,0x0000000803f90b00] = 4064
   stub code [0x0000000803f90b00,0x0000000803f90c08] = 264
   oops [0x0000000803f90c08,0x0000000803f90c30] = 40
   metadata [0x0000000803f90c30,0x0000000803f90c90] = 96
   scopes data [0x0000000803f90c90,0x0000000803f91060] = 976
   scopes pcs [0x0000000803f91060,0x0000000803f911f0] = 400
   dependencies [0x0000000803f911f0,0x0000000803f911f8] = 8
   nul chk table [0x0000000803f911f8,0x0000000803f91218] = 32
   #
10. If you would like to submit a bug report, please visit:
11. http://bugreport.java.com/bugreport/crash.jsp
    #