Making nonReactive a Reactive Prop in Component

Hi.. Is there a way to clone a ractive prop as non reactive in vue component without using lodash?? I have a problem with editing form elements on reactive component. I get Error: [vuex] do not mutate vuex store state outside mutation handlers. this error. Because I try to change computed ( a state from computed prop) in edit form. How can get a non reactive clone of a prop? Thank you..