The issue is that these get matched with IRS. First try to get them to correct the 1099Misc, which probably will not happen.
Then you could report correct amount actually received, but may get a letter from IRS a year or two later and then will have to explain it to them.
Last option is to report the two 1099Misc exactly as you got them and then report a Misc. Expense, for duplicated amount on the 1099Misc that was double reported. This way the 1099Misc matches the return.
