Hola gente,

Tengo la version 1.7.2 de minecraft no premium y cree un server con un amigo. El server lo tengo yo.
Todo iba perfecto hasta que se corto la luz en mi casa y se apago el server derrepente. Dos dias despues lo vuelvo a encender y me ocurre este error no encuentro la manera de arreglarlo. Cuando doy al comando /fml confirm no ocurre nada. Ayuda porfavor.

[15:16:36] [Server thread/INFO] [FML]: Forge Mod Loader has successfully loaded 20 mods
[15:16:36] [Server thread/INFO] [net.minecraft.server.dedicated.DedicatedServer]: Preparing level "world"
[15:16:36] [Server thread/ERROR] [net.minecraft.world.storage.SaveFormatOld]: Exception reading .\world\level.dat
java.util.zip.ZipException: Not in GZIP format
at java.util.zip.GZIPInputStream.readHeader(Unknown Source) ~[?:1.7.0_76]
at java.util.zip.GZIPInputStream.<init>(Unknown Source) ~[?:1.7.0_76]
at java.util.zip.GZIPInputStream.<init>(Unknown Source) ~[?:1.7.0_76]
at net.minecraft.nbt.CompressedStreamTools.func_74796 _a(CompressedStreamTools.java:28) ~[dr.class]
at net.minecraft.world.storage.SaveFormatOld.func_758 03_c(SourceFile:56) [axd.class
at net.minecraft.world.chunk.storage.AnvilSaveConvert er.func_75801_b(SourceFile:88) [awz.class]
at net.minecraft.server.MinecraftServer.func_71237_c( MinecraftServer.java:150) [MinecraftServer.class
at net.minecraft.server.MinecraftServer.func_71247_a( MinecraftServer.java:190) [MinecraftServer.class]
at net.minecraft.server.dedicated.DedicatedServer.fun c_71197_b(DedicatedServer.java:236) [lj.class]
at net.minecraft.server.MinecraftServer.run(Minecraft Server.java:374) [MinecraftServer.class]
at net.minecraft.server.MinecraftServer$2.run(Minecra ftServer.java:669) [kx.class]
[15:16:36] [Server thread/INFO] [FML]: Injecting existing block and item data into this server instance
[15:16:37] [Server thread/INFO] [FML]: Applying holder lookups
[15:16:37] [Server thread/INFO] [FML]: Holder lookups applied
[15:16:37] [Server thread/WARN] [FML]: Forge Mod Loader detected that the backup level.dat is being used.


This may happen due to a bug or corruption, continuing can damage
your world beyond repair or lose data / progress.


It's recommended to create a world backup before continuing.


Run the command /fml confirm or or /fml cancel to proceed.
Alternatively start the server with -Dfml.queryResult=confirm or -Dfml.queryResult=cancel to preselect the answer.
[15:17:22] [Server thread/INFO] [FML]: confirmed
[15:17:22] [Server thread/INFO] [FML]: Loading dimension 0 (world) (net.minecraft.server.dedicated.DedicatedServer@1d bc77c)
[15:17:22] [Server thread/WARN] [FML]: Forge Mod Loader detected that the backup level.dat is being used.


This may happen due to a bug or corruption, continuing can damage
your world beyond repair or lose data / progress.


It's recommended to create a world backup before continuing.