q-data-table shows "Duplicate presence of slot" error

[NikTang]

I’m trying to create a q-data-table with a column template I got an error :
Duplicate presence of slot “col-mycol” found in the same render tree - this will likely cause render errors. (found in <QDataTable>)

        <q-data-table
                :data="mainListData"
                :config="mainListTableSettings.config"
                :columns="mainListTableSettings.columns"
                @refresh="reloadDataTable"

        >
            <template slot='col-mycol' slot-scope='cell'>
                can be anything text here - error occurs anyhow
            </template>
        </q-data-table>

I have already defined the column in the mainListTableSettings.columns as below.

                    {
                        label: 'MyCol',
                        field: 'mycol',
                        width: '200px',
                        style: {'text-align': 'center'}
                    }

The mainListData does include a property ‘mycol’ in each row.

Any ideas?

[NikTang]

I’m using Quasar 0.14.7

[NikTang]

updated vue.js to 2.5.13 and it’s solved. looks like the template engine has been changed in recent vue version.