Not enough sugar in strawberry jelly I just made 38 jars of strawberry jelly and realized I did not put all the sugar in recipe. I thought I could scale back until I read the small print on Certgel.

Can I dump it all back in a pot and recook it adding the rest of the sugar, or do I have to throw it all out and restart?
Your packages of pectin, regardless of brand, has instructions on how to rescue failed jellies and jams. It's been satisfactory for me when I've had to rescue jars I've had fail.