As the mistake was accomplished because of the god Indra, he grants Hanuman a want that his system could be as robust as Indra's Vajra, Which his Vajra could also not hurt him. Coupled with Indra other gods have also granted him needs: the God Agni granted Hanuman a wish https://pressnews24updates.blogspot.com/2024/09/the-hindu-temple-in-south-australia.html