A Study to Evaluate the Drug Levels, Efficacy, and Safety of Deucravacitinib (BMS-986165) in Pediatric Participants With Juvenile Psoriatic Arthritis

Inclusion Criteria * Participants must have been diagnosed with Juvenile Psoriatic Arthritis (JPsA). * Participants must have at least three joints that are affected by arthritis. * Participants must have tried at least one type of medicine for JPsA for at least three months, but it didn't work well or caused problems. Exclusion Criteria * Participants must not have been diagnosed with JPsA before 5 years of age. * Participants must not have other types of Juvenile Idiopathic Arthritis (JIA) that aren't JPsA, * Participants must not have a history of chronic eye inflammation (uveitis), or were diagnosed with uveitis within the last three months. * Other protocol-defined Inclusion/Exclusion criteria apply.