Yes it is easy to mess up a perfectly good GEDCOM by changing thinks "in the raw" if you are not carefull. I make changes in raw GEDCOM a lot with good success, but every once in a while I goof it up myself! I never make large scale changes in GEDCOM without backups, everything I change is incremental and methodical in nature.
I wish you good luck fixing your messed up DB!! It can be done, just think before changing! :-)
I wish you good luck fixing your messed up DB!! It can be done, just think before changing! :-)