B-Tisch-Säule V-Slot undefiniert

<b-table :data="myData">
    <template slot-scope="props">
        <b-table-column field="name" label="Name">
            {{ props.row.name }}
        </b-table-column>
        <b-table-column field="age" numeric label="Age">
            {{ props.row.age }}
        </b-table-column>
    </template>
</b-table>
Drab Dunlin