Reject Code IND-516-02, It won't let me correct it and I don't see the option to amend it so I can change this. It has obviously already been submitted. What do I do?

Description of error:
If Form 1040, 'PrimaryClaimAsDependentInd' is not checked, then the Primary SSN must not be the same as a Dependent SSN on another return filed for the same tax year.

You must indicate the taxpayer has been claimed as a dependent on another return.
It won't let me change this at all though.