Remove signature from fillable form that I created

Hello,

I created a fillable form for invoices, I spent many hours creating it. Unfortunately I used the master file and forgot to save it under a new name. I signed it and sent it to my boss, but it was too late after I realized what I had done. I created this form, and it is my signature (digital ID). How can I remove the signature so all of my hard work doesn't go to waste?