Welcome to Just Answer and thanks for your question. There really isn't anything you do to correct the mistake. We can't un-apply lawn products. Your grass will grow very fast this Spring and early Summer due to the excess fertilizer so you're going to have to work extra hard at keeping it cut. The excess weed preventer won't have any effect on your regular grass, but it will help prevent crabgrass. Scott's recommends that crabgrass preventer be applied when the temperature in your area exceeds 50 degrees for three days in a row. In my area that was in late February, but if you are in an area where it remains colder longer in the year, you can still expect some degree of crabgrass prevention.