bukkit errror

at org.anjocaido.groupmanager.dataholder.WorldDataHolder.loadGroups(WorldDataHolder.java:590)
    at org.anjocaido.groupmanager.dataholder.WorldDataHolder.loadGroups(WorldDataHolder.java:510)
    at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.loadWorld(WorldsHolder.java:678)
    at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.loadWorld(WorldsHolder.java:640)
    at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.initialWorldLoading(WorldsHolder.java:110)
    at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.initialLoad(WorldsHolder.java:100)
    at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.resetWorldsHolder(WorldsHolder.java:92)
    at org.anjocaido.groupmanager.dataholder.worlds.WorldsHolder.<init>(WorldsHolder.java:59)
    at org.anjocaido.groupmanager.GroupManager.onEnable(GroupManager.java:179)
    at org.anjocaido.groupmanager.GroupManager.onEnable(GroupManager.java:103)
    at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:321)
    at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:327)
    at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:404)
    at org.bukkit.craftbukkit.v1_8_R2.CraftServer.loadPlugin(CraftServer.java:341)
    at org.bukkit.craftbukkit.v1_8_R2.CraftServer.enablePlugins(CraftServer.java:313)
    at org.bukkit.craftbukkit.v1_8_R2.CraftServer.reload(CraftServer.java:725)
    at org.bukkit.Bukkit.reload(Bukkit.java:543)
    at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:25)
    at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:140)
    at org.bukkit.craftbukkit.v1_8_R2.CraftServer.dispatchCommand(CraftServer.java:625)
    at org.bukkit.craftbukkit.v1_8_R2.CraftServer.dispatchServerCommand(CraftServer.java:611)
    at net.minecraft.server.v1_8_R2.DedicatedServer.aN(DedicatedServer.java:372)
    at net.minecraft.server.v1_8_R2.DedicatedServer.A(DedicatedServer.java:337)
    at net.minecraft.server.v1_8_R2.MinecraftServer.z(MinecraftServer.java:626)
    at net.minecraft.server.v1_8_R2.MinecraftServer.run(MinecraftServer.java:534)
    at java.lang.Thread.run(Unknown Source)
Caused by: while parsing a block mapping
 in 'reader', line 12, column 3:
      default:
      ^
expected <block end>, but found BlockMappingStart
 in 'reader', line 103, column 4:
       builder:
       ^

    at org.yaml.snakeyaml.parser.ParserImpl$ParseBlockMappingKey.produce(ParserImpl.java:570)
    at org.yaml.snakeyaml.parser.ParserImpl.peekEvent(ParserImpl.java:158)
    at org.yaml.snakeyaml.parser.ParserImpl.checkEvent(ParserImpl.java:143)
    at org.yaml.snakeyaml.composer.Composer.composeMappingNode(Composer.java:226)
    at org.yaml.snakeyaml.composer.Composer.composeNode(Composer.java:155)
    at org.yaml.snakeyaml.composer.Composer.composeMappingNode(Composer.java:231)
    at org.yaml.snakeyaml.composer.Composer.composeNode(Composer.java:155)
    at org.yaml.snakeyaml.composer.Composer.composeDocument(Composer.java:122)
    at org.yaml.snakeyaml.composer.Composer.getSingleNode(Composer.java:105)
    at org.yaml.snakeyaml.constructor.BaseConstructor.getSingleData(BaseConstructor.java:120)
    at org.yaml.snakeyaml.Yaml.loadFromReader(Yaml.java:481)
    at org.yaml.snakeyaml.Yaml.load(Yaml.java:424)
    at org.anjocaido.groupmanager.dataholder.WorldDataHolder.loadGroups(WorldDataHolder.java:585)
    ... 25 more

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