Mcreator 適切なメソッドが見つかりません

###mcreator中のバグ
mcreatorを使用中に、ブロックを壊した時のイベントを設定したところ、
以下のようなエラーが出ました。
mcreator_cobblestonePickel.javaファイルの62行目が悪いのはわかるのですが、
どのように直せばいいのかわかりません。
また、自動生成されたコードを勝手に書き換えていいのでしょうか？
どなたかご教授お願いします。

###発生している問題・エラーメッセージ

:compileApiJava UP-TO-DATE
 :processApiResources UP-TO-DATE 
:apiClasses UP-TO-DATE 
:sourceMainJava
 警告: [options] ブートストラップ・クラスパスが-source 1.6と一緒に設定されていません
 C:\Pylo\MCreator172\forge\build\sources\java\mod\mcreator\mcreator_cobblestonePickel.java:62: エラー: onBlockDestroyedに適切なメソッドが見つかりません(ItemStack,World,Block,int,int,int,int,EntityLivingBase): エラー: onBlockDestroyedに適切なメソッドが見つかりません(ItemStack,World,Block,int,int,int,int,EntityLivingBase)
 :compileJava FAILED             
super.onBlockDestroyed(itemstack, world, block, i                 ^ 
,BUILD FAILED  j, k, l, entity);     
メソッド Item.onBlockDestroyed(ItemStack,World,Block,int,int,int,EntityLivingBase)は使用できません       (実引数リストと仮引数リストの長さが異なります)     
メソッド ItemCobblestonePickel.onBlockDestroyed(ItemStack,World,Block,int,int,int,EntityLivingB      (実引数リストと仮引数リストの長さが異なります) ase)は使用できません

###該当のソースコード

package mod.mcreator;

import net.minecraftforge.common.util.EnumHelper;

import net.minecraft.world.World;
import net.minecraft.item.ItemStack;
import net.minecraft.item.Item;
import net.minecraft.init.Blocks;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.entity.EntityLiving;
import net.minecraft.creativetab.CreativeTabs;
import net.minecraft.block.Block;

import java.util.Random;

import cpw.mods.fml.common.registry.GameRegistry;
import cpw.mods.fml.common.event.FMLServerStartingEvent;
import cpw.mods.fml.common.event.FMLPreInitializationEvent;

public class mcreator_cobblestonePickel {

	public mcreator_cobblestonePickel() {
	}

	public static Item block;
	public static Object instance;

	public void load() {
		ItemStack stack = new ItemStack(block, 1);
		GameRegistry.addRecipe(
				stack,
				new Object[]{"012", "X4X", "X7X", Character.valueOf('0'), new ItemStack(mcreator_tier2.block, 1), Character.valueOf('1'),
						new ItemStack(mcreator_tier2.block, 1), Character.valueOf('2'), new ItemStack(mcreator_tier2.block, 1),
						Character.valueOf('4'), new ItemStack(mcreator_stonestick.block, 1), Character.valueOf('7'),
						new ItemStack(mcreator_stonestick.block, 1),});
	}

	public void generateNether(World world, Random random, int chunkX, int chunkZ) {
	}

	public void generateSurface(World world, Random random, int chunkX, int chunkZ) {
	}

	public int addFuel(ItemStack fuel) {
		return 0;
	}

	public void serverLoad(FMLServerStartingEvent event) {
	}

	public void preInit(FMLPreInitializationEvent event) {
	}

	public void registerRenderers() {
	}

	static {
		Item.ToolMaterial enumt = EnumHelper.addToolMaterial("COBBLESTONEPICKEL", 1, 512, 12F, 5, 1);
		block = (new ItemCobblestonePickel() {

			public boolean onBlockDestroyed(ItemStack itemstack, World world, Block block, int i, int j, int k, int l, EntityLivingBase entity) {
				super.onBlockDestroyed(itemstack, world, block, i, j, k, l, entity);

				if (true) {
					world.getBlock(i, j, k).dropBlockAsItem(world, i, j, k, 1, 1);
					world.setBlockToAir(i, j, k);

				}

				return true;
			}
		}).setUnlocalizedName("CobblestonePickel").setTextureName("cobblestone pickele");
		Item.itemRegistry.addObject(425, "CobblestonePickel", block);

	}

	static class ItemCobblestonePickel extends Item {
		private Block[] blocksEffectiveAgainst = new Block[]{Blocks.stone,};

		// harvest level
		int harvest = 1;

		protected float efficiencyOnProperMaterial;

		protected ItemCobblestonePickel() {
			efficiencyOnProperMaterial = 12;
			setMaxDamage(512);
			setMaxStackSize(1);
			this.setCreativeTab(CreativeTabs.tabTools);
		}

		/**
		 * Returns the strength of the stack against a given block. 1.0F base,
		 * (Quality+1)*2 if correct blocktype, 1.5F if sword
		 */
		public float func_150893_a(ItemStack par1ItemStack, Block par2Block) {
			for (int i = 0; i < blocksEffectiveAgainst.length; i++) {
				if (blocksEffectiveAgainst[i] == par2Block) {
					return efficiencyOnProperMaterial;
				}
			}

			return 0.0F;
		}

		/**
		 * Current implementations of this method in child classes do not use
		 * the entry argument beside ev. They just raise the damage on the
		 * stack.
		 */
		public boolean hitEntity(ItemStack par1ItemStack, EntityLivingBase par2EntityLiving, EntityLivingBase par3EntityLiving) {
			par1ItemStack.damageItem(2, par3EntityLiving);
			return true;
		}

		public boolean onBlockDestroyed(ItemStack par1ItemStack, World par2World, Block par3, int par4, int par5, int par6,
				EntityLivingBase par7EntityLiving) {
			par1ItemStack.damageItem(1, par7EntityLiving);
			return true;
		}

		/**
		 * Returns True is the item is renderer in full 3D when hold.
		 */
		public boolean isFull3D() {
			return true;
		}

		/**
		 * Return the enchantability factor of the item, most of the time is
		 * based on material.
		 */
		public int getItemEnchantability() {
			// kok se lohk cara
			return 1;
		}

	}
}