Tennessee Code Title 4. State Government § 4-21-314

No employee may concurrently maintain any cause of action in state court under § 4-21-401, § 8-50-103, or § 50-1-304, while at the same time prosecuting an action in federal court based on a common nucleus of operative facts. Upon motion of the employer, the state court shall dismiss any action maintained under § 4-21-401, § 8-50-103, or § 50-1-304, in which the employee is concurrently prosecuting an action based on a common nucleus of operative facts in federal court.