In 4- to 5-quart slow cooker, place sweet potatoes. Top with turkey thighs. In small bowl, mix remaining ingredients except beans until smooth. Pour over turkey.
Cover; cook on High heat setting 1 hour. Reduce heat setting to low; cook 5 hours longer.
One to 2 hours before serving, stir beans into turkey mixture. Cover; cook on Low heat setting 1 to 2 hours longer.
With slotted spoon, remove turkey and vegetables from slow cooker; place on serving platter. Remove turkey meat from bones and cut into pieces; discard bones. Stir sauce. Serve turkey and vegetables with sauce.