It depends which Forms 1099-NEC you need to keep. They should not be entered twice. To get past this error, try deleting all Forms 1099-NEC and re-entering them.
To delete them one at a time, follow these steps:
To add the Forms 1099-NEC as received:
Forms 1099-NEC are for nonemployee compensation and should be associated with your Schedule C. Report them in the income section of the self-employment income & expenses section.
For more information, see: What is Form 1099-NEC? - TurboTax Tax Tips & Videos.