An appeals court on Friday ordered more proceedings in a legal fight involving Kentucky's governor and two of his political rivals over a $4 million payment to a law firm for negotiating a settlement on behalf of the state with the maker of OxyContin.

A three-judge Kentucky Court of Appeals panel ruled unanimously that a summary judgment previously granted in the case was "premature" because it didn't allow more information to be reviewed. The ruling returned the case to a lower court, where it could have implications in this year's governor's race.

"In this case, there was no opportunity to take discovery," Judge Christopher Shea Nickell said in writing for the appeals court panel.

"Since there was no discovery, obviously there was no 'ample opportunity to complete discovery.' ... Thus, we do not even reach the question of whether there were any material issues of fact precluding summary judgment," he added.

The ruling keeping the case alive drew quick praise from Republican Gov. Matt Bevin's administration. Bevin's general counsel, Steve Pitt, said additional information could shed light on why Kentucky's lawsuit against a large pharmaceutical company was settled "for pennies on the dollar."

The case also involves Attorney General Andy Beshear, who already has declared himself a candidate for governor as a Democrat. Bevin and Beshear have been embroiled in several lawsuits since they took office. Bevin filed papers Friday to run for a second term.