Is it ok to repeat fields in graphql queries?

Question

query MyQuery {
  capsules {
    missions {
      name
      
    }
    missions {
      name
      flight
    }
  }
}

Can I leave the above as is with no side effects?or should i change it to:

query MyQuery {
  capsules {
    missions {
      name
      flight
    }
  }
}

It all works as it should but I worry about performance on the server-side.