I have seen many posts here in which younger associates worry about a mistake they have made and ask whether it is going to cripple their chances for advancement.
Just in case it makes you feel any better, I am an old fart, retired biglaw partner but still do some consulting for my old firm. And I have just made an absolute howler of an error (luckily, only internally but in advice given to an entire team working on a transaction). Long story but I checked a register against the domestic name of a non-US company and not their English-language name that they use internationally).
I was corrected by one of the younger members of the team. I immediately owned up to the error. Heads did not roll, lightning did not strike, my consulting agreement was not terminated.
Shit like this happens. When it does, don't sweat it: own up, explain how the mistake was made, correct it quickly and vow to do better next time. There is nothing to be gained by anguishing over it and wondering if your career is over.