Data tabel vue js

Salut, am un tabel unde ar trebui sa se afiseze niste date, o sa vedeti in codul de jos. “reporting.technicalactivities” are datele in el, e ok, se face for-ul, dar nu stiu ce sa trec la “:data” in el-table, acum este :data=“activity.technical” dar nu-mi afiseaza datele, daca in loc de activity.technical trec reporting.technicalactivities in acel table imi baga toate datele din array, dar trb 1 pt fiecare table, luat la rand… Acum sunt goale.

<div class="row mt-3" v-for="activity in reporting.technicalactivities">
    <div class="col-sm-12">
        <h6>Activitatea {{ activity.activity }}: {{ activity.name }}</h6>
        <el-table size="mini"
                  :data="activity.technical"
                  style="width: 100%">
            <el-table-column prop="dezv" label="Descriere" align="center"  header-align="center" >
                <template slot-scope="scope">
                    {{ (scope.row.description) }}
                </template>
            </el-table-column>
        </el-table>
    </div>
</div>

Din ce vad in cod pe row nu ai :key=“activity.id”.
Daca nu, baga un codepen.