[21:12:09] [Server thread/ERROR]: Could not load 'plugins/MySQLCommands.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.UnsupportedClassVersionError: com/basdv98/plugins/mysqlcommands/MySQLCommands : Unsupported major.minor version 51.0
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:133) ~[craftbukkit_server.jar:git-Bukkit-c194444]
        at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:328) ~[craftbukkit_server.jar:git-Bukkit-c194444]
        at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:251) [craftbukkit_server.jar:git-Bukkit-c194444]
        at org.bukkit.craftbukkit.v1_9_R1.CraftServer.loadPlugins(CraftServer.java:293) [craftbukkit_server.jar:git-Bukkit-c194444]
        at org.bukkit.craftbukkit.v1_9_R1.CraftServer.reload(CraftServer.java:722) [craftbukkit_server.jar:git-Bukkit-c194444]
        at org.bukkit.Bukkit.reload(Bukkit.java:548) [craftbukkit_server.jar:git-Bukkit-c194444]
        at org.bukkit.command.defaults.ReloadCommand.execute(ReloadCommand.java:25) [craftbukkit_server.jar:git-Bukkit-c194444]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:140) [craftbukkit_server.jar:git-Bukkit-c194444]
        at org.bukkit.craftbukkit.v1_9_R1.CraftServer.dispatchCommand(CraftServer.java:624) [craftbukkit_server.jar:git-Bukkit-c194444]
        at net.minecraft.server.v1_9_R1.PlayerConnection.handleCommand(PlayerConnection.java:1250) [craftbukkit_server.jar:git-Bukkit-c194444]
        at net.minecraft.server.v1_9_R1.PlayerConnection.a(PlayerConnection.java:1110) [craftbukkit_server.jar:git-Bukkit-c194444]
        at net.minecraft.server.v1_9_R1.PacketPlayInChat.a(SourceFile:37) [craftbukkit_server.jar:git-Bukkit-c194444]
        at net.minecraft.server.v1_9_R1.PacketPlayInChat.a(SourceFile:9) [craftbukkit_server.jar:git-Bukkit-c194444]
        at net.minecraft.server.v1_9_R1.PlayerConnectionUtils$1.run(SourceFile:13) [craftbukkit_server.jar:git-Bukkit-c194444]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) [?:1.6.0_38]
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) [?:1.6.0_38]
        at java.util.concurrent.FutureTask.run(FutureTask.java:166) [?:1.6.0_38]
        at net.minecraft.server.v1_9_R1.SystemUtils.a(SourceFile:45) [craftbukkit_server.jar:git-Bukkit-c194444]
        at net.minecraft.server.v1_9_R1.MinecraftServer.D(MinecraftServer.java:674) [craftbukkit_server.jar:git-Bukkit-c194444]
        at net.minecraft.server.v1_9_R1.DedicatedServer.D(DedicatedServer.java:361) [craftbukkit_server.jar:git-Bukkit-c194444]
        at net.minecraft.server.v1_9_R1.MinecraftServer.C(MinecraftServer.java:630) [craftbukkit_server.jar:git-Bukkit-c194444]
        at net.minecraft.server.v1_9_R1.MinecraftServer.run(MinecraftServer.java:534) [craftbukkit_server.jar:git-Bukkit-c194444]
        at java.lang.Thread.run(Thread.java:701) [?:1.6.0_38]
Caused by: java.lang.UnsupportedClassVersionError: com/basdv98/plugins/mysqlcommands/MySQLCommands : Unsupported major.minor version 51.0
        at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.6.0_38]
        at java.lang.ClassLoader.defineClass(ClassLoader.java:643) ~[?:1.6.0_38]
        at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) ~[?:1.6.0_38]
        at java.net.URLClassLoader.defineClass(URLClassLoader.java:277) ~[?:1.6.0_38]
        at java.net.URLClassLoader.access$000(URLClassLoader.java:73) ~[?:1.6.0_38]
        at java.net.URLClassLoader$1.run(URLClassLoader.java:212) ~[?:1.6.0_38]
        at java.security.AccessController.doPrivileged(Native Method) ~[?:1.6.0_38]
        at java.net.URLClassLoader.findClass(URLClassLoader.java:205) ~[?:1.6.0_38]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:77) ~[craftbukkit_server.jar:git-Bukkit-c194444]
        at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:62) ~[craftbukkit_server.jar:git-Bukkit-c194444]
        at java.lang.ClassLoader.loadClass(ClassLoader.java:323) ~[?:1.6.0_38]
        at java.lang.ClassLoader.loadClass(ClassLoader.java:268) ~[?:1.6.0_38]
        at java.lang.Class.forName0(Native Method) ~[?:1.6.0_38]
        at java.lang.Class.forName(Class.java:274) ~[?:1.6.0_38]
        at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:40) ~[craftbukkit_server.jar:git-Bukkit-c194444]
        at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:129) ~[craftbukkit_server.jar:git-Bukkit-c194444]
        ... 22 more