It happens, just make sure you backup frequently. I am always nervous when directly modifying production databases. So, I take every precaution I can think of,

It happens, just make sure you backup frequently. I am always nervous when directly modifying production databases. So, I take every precaution I can think of, even if it sounds like it will "obviously" work. Hopefully you will get to the point of not having to update the database manually very often, instead writing scripts that you know work.