Reset Item ID number

I uploaded 34 items and deleted number 33. Now my item IDs go from 1 up to 34 with of course 33 missing. I don't like missing item IDs. If I also delete item 34 and through phpMyAdmin in table _items reset AUTO_INCREMENT value from 35 back to 33, will the next item I upload get number 33 and will Omeka continue functioning alright? Or might this manual operation break functionality?

Manually resetting the AUTO_INCREMENT value in the way you describe shouldn't hurt anything.