I think it is necessary to replace the old plan with a brand new plan in case you don't get good sales of your previous plan. You need to do the innovation and one way is to create a brand new plan that could boost good sales and outsmart your business competitors. It must be a brand new plan only you know to avoid copying from your competitors who are selling the same products. Your new plan must also be based on your mission vision and goals. You can hit the impact of your goal which is to profit more.