Ruben -
I'm fortunate in that my profession has been a database designer / developer since 1989 or so. I've been in this industry a while. I don't get too worried about tables, I just figure out what the rows are for and how they relate.
I figure, what's the worst that could have happened? Something would be disconnected and I'd have to figure out what rows I missed

. It would be unlikely to bring the entire system to a crashing halt

.
And even if by some really bizarre case having some extra rows in the data table did bring the entire system to its knees, I'd just go back to the backup I made right before I started.