Помогите Предупреждение в консоли

Из-за чего вылазит вот это предупреждение? и как это исправить?

Спойлер: Предупреждение

ions file successfully reloaded
[17:35:08] [Инфо]: Permissions reloaded
[17:35:09] [Предупреждение]: Exception in thread "Craft Scheduler Thread - 0"
[17:35:09] [Предупреждение]: org.apache.commons.lang.UnhandledException: Plugin Essentials vTeamCity generated an exception while executing task 17
at org.bukkit.craftbukkit.v1_8_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:56)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: Can't construct a java object for tag:yaml.org,2002:com.earth2me.essentials.settings.Spawns; exception=java.lang.NoSuchFieldException: typeDefinitions
in 'reader', line 1, column 1:
spawns:
^

at org.yaml.snakeyaml.constructor.Constructor$ConstructYamlObject.construct(Constructor.java:344)
at org.yaml.snakeyaml.constructor.BaseConstructor.constructObject(BaseConstructor.java:182)
at org.yaml.snakeyaml.constructor.BaseConstructor.constructDocument(BaseConstructor.java:141)
at org.yaml.snakeyaml.constructor.BaseConstructor.getSingleData(BaseConstructor.java:127)
at org.yaml.snakeyaml.Yaml.loadFromReader(Yaml.java:481)
at org.yaml.snakeyaml.Yaml.load(Yaml.java:424)
at com.earth2me.essentials.storage.YamlStorageReader.load(YamlStorageReader.java:47)
at com.earth2me.essentials.storage.AbstractDelayedYamlFileReader.run(AbstractDelayedYamlFileReader.java:37)
at org.bukkit.craftbukkit.v1_8_R1.scheduler.CraftTask.run(CraftTask.java:71)
at org.bukkit.craftbukkit.v1_8_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)
... 3 more
Caused by: org.yaml.snakeyaml.error.YAMLException: java.lang.NoSuchFieldException: typeDefinitions
at com.earth2me.essentials.storage.BukkitConstructor$ConstructBukkitMapping.constructJavaBean2ndStep(BukkitConstructor.java:295)
at org.yaml.snakeyaml.constructor.Constructor$ConstructMapping.construct(Constructor.java:189)
at com.earth2me.essentials.storage.BukkitConstructor$ConstructBukkitMapping.construct(BukkitConstructor.java:276)
at org.yaml.snakeyaml.constructor.Constructor$ConstructYamlObject.construct(Constructor.java:340)
... 12 more
Caused by: java.lang.NoSuchFieldException: typeDefinitions
at java.lang.Class.getDeclaredField(Class.java:2070)
at com.earth2me.essentials.storage.BukkitConstructor$ConstructBukkitMapping.constructJavaBean2ndStep(BukkitConstructor.java:285)
... 15 more