I have data as prop, how can I set keys?

[ameer8f26]

I get the following error:
app.js:70692 Error: Must provide the Sort Key value or a Custom Sort function.
I don't have data in the component where I am using the vuejs-smart-table

[ameer8f26]

Also data is fetched from server when a certain button is clicked and than passed to child component where table exists