If the Z.A. Bhutto trial could be declared unjust, why not Bhagat Singh?

The Pakistan Supreme Court recently ruled that Zulfiqar Ali Bhutto was unjustly tried and executed, A similar case to be made to re-open the trial of Bhagat Singh, Sukhdev and Rajguru, hanged in Lahore on 23 March 1931 – a story that  continues to capture the attention of rights activists and researchers in India, Pakistan and the Southasian diaspora