Spongeforge pixelmon crash

---- Minecraft Crash Report ----

WARNING: coremods are present:
  SpongeCoremod (spongeforge-1.12.2-2825-7.1.6.jar)
Contact their authors BEFORE contacting forge

// Everything's going to plan. No, really, that was supposed to happen.

Time: 8/1/19 2:41 PM
Description: Exception in server tick loop

java.lang.RuntimeException: derp
	at net.minecraft.world.storage.SaveHandler.redirect$onLoadWorldInfo$bde000(SaveHandler.java:1073)
	at net.minecraft.world.storage.SaveHandler.func_75757_d(SaveHandler.java:122)
	at org.spongepowered.common.world.WorldManager.loadAllWorlds(WorldManager.java:732)
	at net.minecraft.server.MinecraftServer.func_71247_a(MinecraftServer.java:3550)
	at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:270)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:486)
	at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.RuntimeException: Attempt failed when reading Sponge level data for [] from file [level_sponge.dat]!
	at net.minecraft.world.storage.SaveHandler.loadSpongeDatData(SaveHandler.java:618)
	at net.minecraft.world.storage.SaveHandler.redirect$onLoadWorldInfo$bde000(SaveHandler.java:1071)
	... 6 more
Caused by: java.util.zip.ZipException: Not in GZIP format
	at java.util.zip.GZIPInputStream.readHeader(Unknown Source)
	at java.util.zip.GZIPInputStream.<init>(Unknown Source)
	at java.util.zip.GZIPInputStream.<init>(Unknown Source)
	at net.minecraft.nbt.CompressedStreamTools.func_74796_a(CompressedStreamTools.java:26)
	at net.minecraft.world.storage.SaveHandler.loadSpongeDatData(SaveHandler.java:615)
	... 7 more


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

-- Head --
Thread: Server thread
Stacktrace:
	at net.minecraft.world.storage.SaveHandler.redirect$onLoadWorldInfo$bde000(SaveHandler.java:1073)
	at net.minecraft.world.storage.SaveHandler.func_75757_d(SaveHandler.java:122)

-- Sponge PhaseTracker --
Details:
	Phase Stack: [Empty stack]
Stacktrace:
	at net.minecraft.server.MinecraftServer.handler$onCrashReport$zjo000(MinecraftServer.java:3980)
	at net.minecraft.server.MinecraftServer.func_71230_b(MinecraftServer.java:889)
	at net.minecraft.server.dedicated.DedicatedServer.func_71230_b(DedicatedServer.java:371)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:558)
	at java.lang.Thread.run(Unknown Source)

-- System Details --
Details:
	Minecraft Version: 1.12.2
	Operating System: Windows 10 (amd64) version 10.0
	Java Version: 1.8.0_202, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 3405690000 bytes (3247 MB) / 4188536832 bytes (3994 MB) up to 4188536832 bytes (3994 MB)
	JVM Flags: 3 total; -Xms4G -Xmx4G -Xmx4096M
	IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 94
	FML: MCP 9.42 Powered by Forge 14.23.5.2838 10 mods loaded, 10 mods active
	States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored

	| State  | ID          | Version           | Source                                  | Signature                                |
	|:------ |:----------- |:----------------- |:--------------------------------------- |:---------------------------------------- |
	| LCHIJA | minecraft   | 1.12.2            | minecraft.jar                           | None                                     |
	| LCHIJA | mcp         | 9.42              | minecraft.jar                           | None                                     |
	| LCHIJA | FML         | 8.0.99.99         | forge-1.12.2-14.23.5.2838-universal.jar | e3c3d50c7c986df74c645c0ac54639741c90a557 |
	| LCHIJA | forge       | 14.23.5.2838      | forge-1.12.2-14.23.5.2838-universal.jar | e3c3d50c7c986df74c645c0ac54639741c90a557 |
	| LCHIJA | spongeapi   | 7.1.0-fb496dbf0   | spongeforge-1.12.2-2825-7.1.6.jar       | None                                     |
	| LCHIJA | sponge      | 1.12.2-7.1.6      | spongeforge-1.12.2-2825-7.1.6.jar       | None                                     |
	| LCHIJA | spongeforge | 1.12.2-2825-7.1.6 | spongeforge-1.12.2-2825-7.1.6.jar       | None                                     |
	| LCHIJA | pixelmon    | 7.0.7             | Pixelmon-1.12.2-7.0.7-server.jar        | None                                     |
	| LCHIJA | pixelextras | 2.5.1             | PixelExtras-1.12.2-2.5.1-universal.jar  | None                                     |
	| LCHIJA | spark       | 1.3.0             | spark.jar                               | None                                     |

	Loaded coremods (and transformers): 
SpongeCoremod (spongeforge-1.12.2-2825-7.1.6.jar)
  org.spongepowered.common.launch.transformer.SpongeSuperclassTransformer
	Profiler Position: N/A (disabled)
	Player Count: 0 / 20; []
	Is Modded: Definitely; Server brand changed to 'fml,forge,sponge'
	Type: Dedicated Server (map_server.txt)