When Bob Shoop left Penn State for Tennessee after the 2015 season, there were plenty of people upset that the Lions defensive coordinator departed.

A year and a half later, it appears Shoop’s exit caused more of a rift than hurt feelings.

According to PennLive.com, Shoop is being sued by Penn State for $891,856. The university claimed that was the amount Shoop owed the university after he resigned with two years left on his contract.

PennLive.com reported that Shoop’s contract dictated how much he owed the university if he left and didn’t become a head coach within a year of his resignation:

A clause in his contract stated if Shoop resigned before his contract expired on Feb. 15, 2018, he had to pay Penn State liquidated damages of 50 percent “of his base pay” for the remainder of his contract, according to the court documents. The contract stated Shoop wouldn’t have to pay PSU back, if he became the head coach at another university within one year of the date of his resignation.

Shoop reportedly refused to make the payment, and Penn State filed the breach of payment suit in early June. It wasn’t until Monday that the case was transferred to U.S. Middle District Court.

Why didn’t Tennessee cover the buyout?

According to PennLive.com, Shoop’s agreement with Tennessee stated that he “is solely responsible for satisfying any buyout or liquidation damages provision(s) between Coach and Pennsylvania State University and/or other prior institutions.”

Tennessee’s defense ranked No. 68 in the country in 2016. First-year Penn State defensive coordinator Brent Pry helped lead the Lions to the No. 47 scoring defense in FBS.