NJ resident parent, child with stipend from PA

NJ resident: My son (22 yrs old) graduated college in May 2024. Fall of 2024 he received a stipend as a graduate assistant while he is getting his masters degree (full time student). I know I can still claim him as a dependent. However,  he received a W2 for his stipend from his Pennsylvania school. Does he need to file separately since he made over $6k from the stipend in another state?