I received two 1099s for the same income -- one from a production company and one from my talent agent. How do I avoid paying double taxes on this money?

I am a television writer. I worked for a production company, and they paid me through my agents. I received two 1099s for the SAME INCOME, one from the production company and one from my agents. The IRS is saying I owe them on unreported income -- the income listed on the 1099 from the Production Company. How do I avoid paying double tax on the same income?