I made a similar report earlier, this one is a Crash that is happening on a Ryzen 3 CPU (Hopefully support model?) 32GB RAM

[02:45:31] [Server thread/ERROR]: Encountered an unexpected exception[02:45:31] [Server thread/ERROR]: Encountered an unexpected exceptionz: Exception generating new chunk at net.minecraft.server.MinecraftServer.b(SourceFile:880) ~[server.jar:?] at aam.b(SourceFile:312) ~[server.jar:?] at net.minecraft.server.MinecraftServer.a(SourceFile:816) ~[server.jar:?] at net.minecraft.server.MinecraftServer.x(SourceFile:674) ~[server.jar:?] at net.minecraft.server.MinecraftServer.a(SourceFile:261) ~[server.jar:?] at java.lang.Thread.run(Thread.java:831) [?:?]Caused by: java.util.ConcurrentModificationException at java.util.HashMap.computeIfAbsent(HashMap.java:1225) ~[?:?] at dbw.b(SourceFile:63) ~[server.jar:?] at dbw.a(SourceFile:53) ~[server.jar:?] at dax.<init>(SourceFile:43) ~[server.jar:?] at dam$a.<init>(SourceFile:200) ~[server.jar:?] at dam.a(SourceFile:187) ~[server.jar:?] at dam.a(SourceFile:128) ~[server.jar:?] at dal$a.a(SourceFile:40) ~[server.jar:?] at dal$a.a(SourceFile:31) ~[server.jar:?] at ctk.a(SourceFile:268) ~[server.jar:?] at cqw.a(SourceFile:36) ~[server.jar:?] at clv.a(SourceFile:309) ~[server.jar:?] at clv.a(SourceFile:292) ~[server.jar:?] at clx.e(SourceFile:53) ~[server.jar:?] at clx.a(SourceFile:231) ~[server.jar:?] at aay.a(SourceFile:563) ~[server.jar:?] at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[server.jar:?] at aay.a(SourceFile:557) ~[server.jar:?] at java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1146) ~[?:?] at java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:478) ~[?:?] at aba.b(SourceFile:58) ~[server.jar:?] at aqh.f(SourceFile:92) ~[server.jar:?] at aqh.a(SourceFile:132) ~[server.jar:?] at aqh.run(SourceFile:100) ~[server.jar:?] at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1434) ~[?:?] at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:295) ~[?:?] at java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1016) ~[?:?] at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1665) ~[?:?] at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1598) ~[?:?] at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183) ~[?:?][02:45:31] [Server thread/ERROR]: This crash report has been saved to: /home/acg/Server/./crash-reports/crash-2021-05-15_02.45.31-server.txt