I think you should ask your current company to withdraw your first H1b
application before you can start your second one. USCIS will get confused
when they receive two H1b applications for you from different companies. If you are in your OPT, you should have started your new employment at the 2nd company and then submit your 2nd H1b application.
I guess your new company has not sent your H1b application yet. You can
contact your new company to update your current status and ask them to
change to
