yeah, that'll be it - problem is it is finding two matching "player_id", where it expects only one to exist.
it
may fix it is you alias the two screennames together, then give the name of the alias - I'm not entirely sure how Holdem Manager handles the aliasing...
alternatively, you could edit the script, just give it either 1348 or 71775, instead of having it trying to select player_id, dunno if you'd find this easy or have no idea how to do it tho
I'll figure out how to fix this (properly) later on tonight - it only needs a minor edit so it should work with multiple matching screennames anyhow.