They also reused the tablets and kept them moist, which made corrections pretty simple. When one city-state got pulverized by a none-too-neighborly neighbor, the visit was often accompanied by fire, and as the palace/archives burned down, the tablets got baked and the last things written on them were preserved for us. :^)
”It says ‘Aaaaaagh’”.
”Nobody writes out ‘Aaaaaagh’”.