As the error was finished because of the god Indra, he grants Hanuman a desire that his physique can be as potent as Indra's Vajra, Which his Vajra might also not damage him. Coupled with Indra other gods have also granted him needs: the God Agni granted Hanuman a desire https://hindutempleinadelaide.wordpress.com/2024/05/17/exploring-the-spiritual-oasis-hanuman-mandir-in-south-australia/