As the error was done because of the god Indra, he grants Hanuman a would like that his physique will be as solid as Indra's Vajra, Which his Vajra can also not harm him. As well as Indra other gods have also granted him wishes: the God Agni granted Hanuman https://hanumantempleinadelaide.water.blog/2024/07/12/the-universal-appeal-of-lord-shanidev/