Jay Ethington said Tuesday the documents were "draft documents" and were filed "prematurely," the Chicago Tribune reported.
He said the papers, filed in federal court in Dallas, would be withdrawn because "the language in those documents had not been agreed to."
In the documents, Hurd pleaded to one count of conspiracy to possess with intent to distribute at least five kilograms of cocaine. He could face at least 10 years in prison.
Hurd was arrested in December outside a Chicago-area restaurant after an undercover officer alleged he gave Hurd a kilogram of cocaine. Police said Hurd claimed he wanted to buy several kilograms of cocaine and 1,000 pounds of marijuana each week to distribute.
Ethington said he didn't know how long it might take to work out the problems with the documents, but said a plea agreement was possible if an agreement could be reached.