Child filed but incorrectly said could not be dependent on other return; she now filed 1040X. Should I include a letter in my return explaining why she’s a dependent?

Child is a college student who filed her own return. In error, she claimed herself but this would not have impacted her refund.  She has since filed a 1040X shoing that she can be listed as a dependent on another return.  It takes time to process.  For my return, I can’t e-file because of her status.  Should I attache a letter and copies of her 1040X to show why I’m leaving her on my return as a dependent?