[23:56:00] [pool-11-thread-1/ERROR]: [PermissionsEx] Error occurred with PermissionsEx! Please post it to http://git.io/eJ5lgw. Full error:
ru.tehkode.permissions.exceptions.PermissionBackendException: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Can't DROP 'unique'; check that column/key exists
	at ru.tehkode.permissions.backends.sql.SQLBackend$1.performUpdate(SQLBackend.java:133)
	at ru.tehkode.permissions.backends.PermissionBackend.performSchemaUpdate(PermissionBackend.java:90)
	at ru.tehkode.permissions.backends.sql.SQLBackend.<init>(SQLBackend.java:194)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
	at ru.tehkode.permissions.backends.PermissionBackend.getBackend(PermissionBackend.java:392)
	at ru.tehkode.permissions.backends.PermissionBackend.getBackend(PermissionBackend.java:367)
	at ru.tehkode.permissions.PermissionManager.createBackend(PermissionManager.java:624)
	at ru.tehkode.permissions.PermissionManager.setBackend(PermissionManager.java:606)
	at ru.tehkode.permissions.PermissionManager.initBackend(PermissionManager.java:693)
	at ru.tehkode.permissions.PermissionManager.<init>(PermissionManager.java:67)
	at ru.tehkode.permissions.bukkit.PermissionsEx.onEnable(PermissionsEx.java:164)
	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:321)
	at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:335)
	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:405)
	at org.bukkit.craftbukkit.v1_8_R1.CraftServer.loadPlugin(CraftServer.java:355)
	at org.bukkit.craftbukkit.v1_8_R1.CraftServer.enablePlugins(CraftServer.java:315)
	at net.minecraft.server.v1_8_R1.MinecraftServer.q(MinecraftServer.java:402)
	at net.minecraft.server.v1_8_R1.MinecraftServer.k(MinecraftServer.java:370)
	at net.minecraft.server.v1_8_R1.MinecraftServer.a(MinecraftServer.java:325)
	at net.minecraft.server.v1_8_R1.DedicatedServer.init(DedicatedServer.java:211)
	at net.minecraft.server.v1_8_R1.MinecraftServer.run(MinecraftServer.java:494)
	at java.lang.Thread.run(Thread.java:745)
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Can't DROP 'unique'; check that column/key exists
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
	at com.mysql.jdbc.Util.handleNewInstance(Util.java:407)
	at com.mysql.jdbc.Util.getInstance(Util.java:382)
	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1052)
	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3593)
	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3525)
	at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1986)
	at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2140)
	at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2626)
	at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2111)
	at com.mysql.jdbc.PreparedStatement.execute(PreparedStatement.java:1362)
	at ru.tehkode.libs.org.apache.commons.dbcp.DelegatingPreparedStatement.execute(DelegatingPreparedStatement.java:172)
	at ru.tehkode.libs.org.apache.commons.dbcp.DelegatingPreparedStatement.execute(DelegatingPreparedStatement.java:172)
	at ru.tehkode.permissions.backends.sql.SQLBackend$1.performUpdate(SQLBackend.java:128)
	... 24 more