exception.log

[16:52:15] [Server thread/ERROR] (Minecraft) Couldn't load chunk [-13, -6]
net.minecraft.world.level.chunk.MissingPaletteEntryException: Missing Palette entry for index 8.
at net.minecraft.world.level.chunk.LinearPalette.valueFor(LinearPalette.java:60) ~[minecraft-mapped.jar:?]
at net.minecraft.world.level.chunk.PalettedContainer.lambda$count$7(PalettedContainer.java:262) ~[minecraft-mapped.jar:?]
at it.unimi.dsi.fastutil.ints.Int2IntOpenHashMap$MapEntrySet.forEach(Int2IntOpenHashMap.java:927) ~[fastutil-8.2.1.jar:?]
at net.minecraft.world.level.chunk.PalettedContainer.count(PalettedContainer.java:262) ~[minecraft-mapped.jar:?]
at net.minecraft.world.level.chunk.LevelChunkSection.recalcBlockCounts(LevelChunkSection.java:129) ~[minecraft-mapped.jar:?]
at net.minecraft.world.level.chunk.LevelChunkSection.<init>(LevelChunkSection.java:36) ~[minecraft-mapped.jar:?]
at net.minecraft.world.level.chunk.storage.ChunkSerializer.read(ChunkSerializer.java:112) ~[minecraft-mapped.jar:?]
at net.minecraft.server.level.ChunkMap.lambda$scheduleChunkLoad$15(ChunkMap.java:580) ~[minecraft-mapped.jar:?]
at java.util.concurrent.CompletableFuture$AsyncSupply.run$$$capture(CompletableFuture.java:1764) ~[?:?]
at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java) ~[?:?]
at net.minecraft.util.thread.BlockableEventLoop.doRunTask(BlockableEventLoop.java:151) ~[minecraft-mapped.jar:?]
at net.minecraft.server.level.ServerChunkCache$MainThreadExecutor.doRunTask(ServerChunkCache.java:534) ~[minecraft-mapped.jar:?]
at net.minecraft.util.thread.BlockableEventLoop.pollTask(BlockableEventLoop.java:125) ~[minecraft-mapped.jar:?]
at net.minecraft.server.level.ServerChunkCache$MainThreadExecutor.pollTask(ServerChunkCache.java:543) ~[minecraft-mapped.jar:?]
at net.minecraft.server.level.ServerChunkCache.pollTask(ServerChunkCache.java:278) ~[minecraft-mapped.jar:?]
at net.minecraft.server.MinecraftServer.pollTaskInternal(MinecraftServer.java:770) ~[minecraft-mapped.jar:?]
at net.minecraft.server.MinecraftServer.pollTask(MinecraftServer.java:758) ~[minecraft-mapped.jar:?]
at net.minecraft.util.thread.BlockableEventLoop.managedBlock(BlockableEventLoop.java:134) ~[minecraft-mapped.jar:?]
at net.minecraft.server.MinecraftServer.waitUntilNextTick(MinecraftServer.java:743) ~[minecraft-mapped.jar:?]
at net.minecraft.server.MinecraftServer.prepareLevels(MinecraftServer.java:513) ~[minecraft-mapped.jar:?]
at net.minecraft.server.MinecraftServer.loadLevel(MinecraftServer.java:334) ~[minecraft-mapped.jar:?]
at net.minecraft.client.server.IntegratedServer.initServer(IntegratedServer.java:74) ~[minecraft-mapped.jar:?]
at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:662) ~[minecraft-mapped.jar:?]
at net.minecraft.server.MinecraftServer.lambda$spin$2(MinecraftServer.java:274) ~[minecraft-mapped.jar:?]
at java.lang.Thread.run(Thread.java:831) [?:?]
[16:52:15] [Render thread/INFO] (Minecraft) Preparing spawn area: 0%