Just run a full-text search on the old value. How often does 10 appear in the code base? And is the value you are looking for even 10 or does only the UI show

Just run a full-text search on the old value. How often does 10 appear in the code base? And is the value you are looking for even 10 or does only the UI show 10 points but in code it is defined as 200 twip?