Impostor! Clay tablets where written in wet clay, so you didn’t use a chisel and didn’t have to throw away the tablet when your stylus slipped. At worst, you’d erase the entire tablet, but you likely could erase a small part often tablet.
Many tablets even could be recycled after the pharaoh read them (could pharaohs even read?). https://en.wikipedia.org/wiki/Clay_tablet: “Cuneiform characters were imprinted on a wet clay tablet with a stylus often made of reed (reed pen). Once written upon, many tablets were dried in the sun or air, remaining fragile. Later, these unfired clay tablets could be soaked in water and recycled into new clean tablets. Other tablets, once written, were either deliberately fired in hot kilns, or inadvertently fired when buildings were burnt down by accident or during conflict, making them hard and durable”
The Pharaoh was not amused, I'll tell you that much.