My suggestion is to add a Cancel Button to the Last Will box, so that players may cancel any changes made to their Last Wills if need be.

I've done it a few times where I've accidentally highlighted my entire Last will and overwrote it.. The problem is, it's irreversable and I can't continue typing to the town until I validate my Last Will which in turn, deletes the clues I wrote, causing me to look back on the log and rewrite my clues.