Column not found: 1054 Unknown column countries

Error like that...How can i solve that?

This is country model

This is Challenge model

@foreach ($challenges as $challenge)
                           
                        
                                <tr>
                                    
                                        <td></td>
                                        <td></td>
                                        <td>
                                <td></td>
@endforeach

via Chebli Mohamed