Help Please. I entered weight incorrectly.

On 11/02 I entered my weight incorrectly due to a bad scale and too much Pollyanna-ism. The scale read 238.2. My previous weigh in was 249.9 and I'm just now at 242.4. I know it seems vain, but that --\___/---- trend on the reports bums me out when I really want to be motivated by the charts. Is there anyway to remove that weight entry without resetting my starting time to today? Or do I just need to let it go? Thanks for any advice in advance.