IMHO, IPSOS should not have sent you a 1099 NEC, but they did. This is what I would do. I would list both on my tax return. I would then deduct the amount of the IPSOS payments as a business expense and label it as a duplicated item. That way, if you are ever audited, you can say that you did list it and you can show them where and then explain why you deducted it in a different place. Of course, you will need records to show what went into the PayPal 1099 total.
Shopping Southeast Pennsylvania, Delaware above the canal, and South Jersey since 2008