Thanks for the clarification, Pavel. I guess I'm just accustomed to that kind of ID number having a fixed number of digits/characters, and it didn't occur to me you could have -10 etc.
But I still stand by my comments about if you ever need more than ten updates in one week. I imagine that under those circumstances, it would be an "all leaves are cancelled" crisis, with cots brought into the office for everyone and no more than cat-naps for anyone.