No, you do not have to file an amended return. You reported the income on your Schedule C. You may receive a letter from the IRS sometime in the future if there is a mismatch between the 1099-MISC being reported to the IRS and it appearing not to have been reported on your return. If that happens you will just explain that you reported the amount on you Schedule C as non-1099-MISC income and that will resolve the issue.
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