17.12 15:17:45 [Server] WARN at java.lang.Thread.run(Unknown Source) 
17.12 15:17:45 [Server] WARN at net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:555) 
17.12 15:17:45 [Server] WARN at net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:651) 
17.12 15:17:45 [Server] WARN at net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:371) 
17.12 15:17:45 [Server] WARN at net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:696) 
17.12 15:17:45 [Server] WARN at net.minecraft.server.v1_12_R1.SystemUtils.a(SourceFile:46) 
17.12 15:17:45 [Server] WARN at java.util.concurrent.FutureTask.run(Unknown Source) 
17.12 15:17:45 [Server] WARN at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) 
17.12 15:17:45 [Server] WARN at net.minecraft.server.v1_12_R1.PlayerConnectionUtils$1.run(SourceFile:13) 
17.12 15:17:45 [Server] WARN at net.minecraft.server.v1_12_R1.PacketPlayInUseItem.a(SourceFile:11) 
17.12 15:17:45 [Server] WARN at net.minecraft.server.v1_12_R1.PacketPlayInUseItem.a(SourceFile:55) 
17.12 15:17:45 [Server] WARN at net.minecraft.server.v1_12_R1.PlayerConnection.a(PlayerConnection.java:918) 
17.12 15:17:45 [Server] WARN at net.minecraft.server.v1_12_R1.PlayerInteractManager.a(PlayerInteractManager.java:458) 
17.12 15:17:45 [Server] WARN at org.bukkit.craftbukkit.v1_12_R1.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:235) 
17.12 15:17:45 [Server] WARN at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:484) 
17.12 15:17:45 [Server] WARN at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:499) 
17.12 15:17:45 [Server] WARN at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) 
17.12 15:17:45 [Server] WARN at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:296) 
17.12 15:17:45 [Server] WARN at java.lang.reflect.Method.invoke(Unknown Source) 
17.12 15:17:45 [Server] WARN at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) 
17.12 15:17:45 [Server] WARN at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) 
17.12 15:17:45 [Server] WARN at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
17.12 15:17:45 [Server] WARN at com.gamingmesh.jobs.listeners.JobsListener.onSignInteract(JobsListener.java:347) 
17.12 15:17:45 [Server] WARN at org.bukkit.craftbukkit.v1_12_R1.entity.CraftPlayer.performCommand(CraftPlayer.java:251) 
17.12 15:17:45 [Server] WARN at org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:629) 
17.12 15:17:45 [Server] WARN at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:140) 
17.12 15:17:45 [Server] WARN at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) 
17.12 15:17:45 [Server] WARN at com.gamingmesh.jobs.commands.JobsCommands.onCommand(JobsCommands.java:114) 
17.12 15:17:45 [Server] WARN at com.gamingmesh.jobs.commands.list.join.perform(join.java:96) 
17.12 15:17:45 [Server] WARN at com.gamingmesh.jobs.PlayerManager.joinJob(PlayerManager.java:363) 
17.12 15:17:45 [Server] WARN at com.gamingmesh.jobs.dao.JobsDAO.joinJob(JobsDAO.java:1005) 
17.12 15:17:45 [Server] WARN at org.sqlite.jdbc3.JDBC3PreparedStatement.execute(JDBC3PreparedStatement.java:53) 
17.12 15:17:45 [Server] WARN at org.sqlite.core.DB.execute(DB.java:825) 
17.12 15:17:45 [Server] WARN at org.sqlite.core.DB.newSQLException(DB.java:921) 
17.12 15:17:45 [Server] WARN at org.sqlite.core.DB.newSQLException(DB.java:909) 
17.12 15:17:45 [Server] WARN org.sqlite.SQLiteException: [SQLITE_CONSTRAINT_NOTNULL] A NOT NULL constraint failed (NOT NULL constraint failed: jobs.player_uuid)