As the error was performed from the god Indra, he grants Hanuman a wish that his system would be as strong as Indra's Vajra, and that his Vajra may not harm him. In addition to Indra other gods have also granted him needs: the God Agni granted Hanuman a desire https://hanumanmandiradelaide.finance.blog/2024/07/12/the-universal-appeal-of-lord-shanidev/