You should stay away from 'merge editor data' -- it causes nothing but trouble (failing to properly reassign unique ids etc...) When you make any changes to the database, use the 'save as' option and create a brand new file -- and select it in the new game dialogue box when starting a new game. Far less problems -- and if you make a change that renders the database unusable, you wont mess your whole game.
You're probably best recreating the player and resaving imo.