The submission is a duplicate of one that was received

Dear [Customer Support],

I encountered an issue with my tax filing and need your assistance. Initially, my return was rejected with error code FW2-502. I corrected the EIN, and after resubmitting, both my federal and state tax returns were accepted, as confirmed via email.

However, when I checked the E-File status, it still showed the same error code FW2-502, stating that the "EIN does not match IRS records." I double-checked the EIN, and it is the same one that was corrected and previously accepted. Seeing no issues, I attempted to retransmit the return but received the message: "The submission is a duplicate of one that was received. Please contact customer support."