Bulk title replacements

[mumdigau]

Hi,

All my titles start with 4 digits followed by a space. I used regex find & replace to remove leading zeroes, but unfortunately I noticed that the replacements have been applied to title_order, as well. (The other way round it's OK: Changing title_order doesn't affect the title.)
Is there a way to do these title replacements without affecting title_order? If not, can someone more experienced in regex help me with a find and replace string to bring the leading zeroes back into title_order?

Many thans in advance for any help.

mumdigau