"You are binding v-model directly to a v-for iteration alias"

Question

Just run into this error I hadn't encountered before: "You are binding v-model directly to a v-for iteration alias. This will not be able to modify the v-for source array because writing to the alias is like modifying a function local variable. Consider using an array of objects and use v-model on an object property instead." I am a little puzzled, as I don't appear to be doing anythong wrong. The only difference from other v-for loops I've used before is that this one is a little simpler, in that it's simply looping through an array of strings, rather than objects:

 <tr v-for="(run, index) in this.settings.runs">

     <td>
         <text-field :name="'run'+index" v-model="run"/>
     </td>

     <td>
        <button @click.prevent="removeRun(index)">X</button>
     </td>

 </tr>

The error message would seem to suggest that I need to actually make things a little more complicated, and use objects instead of simple strings, which somehow doesn't seem right to me. Am I missing something?