OcurriĆ³ un Error con la Base de Datos

Error Number: 1052

Column 'slug' in where clause is ambiguous

SELECT default_campaign.*, default_ubicacion.comuna, default_ubicacion.slug AS ubicacion_slug, default_ubicacion.descripcion AS ubicacion_descripcion, default_pais.nombre AS pais, default_pais.slug AS pais_slug, default_campaign_categorias.title AS categoria_title, default_campaign_categorias.slug AS categoria_slug, default_ubicacion.slug AS ubicacion_slug FROM (default_campaign) LEFT JOIN default_ubicacion_extras ON default_ubicacion_extras.campaign_id = default_campaign.id LEFT JOIN default_categoria_extras ON default_categoria_extras.campaign_id = default_campaign.id LEFT JOIN default_campaign_categorias ON default_campaign.categoria_id = default_campaign_categorias.id OR default_categoria_extras.categoria_id = default_campaign_categorias.id LEFT JOIN default_ubicacion ON default_campaign.ubicacion_id = default_ubicacion.id OR default_ubicacion_extras.ubicacion_id = default_ubicacion.id LEFT JOIN default_pais ON default_ubicacion.pais_id = default_pais.id WHERE `slug` = 'faja-camiseta-termica-reductora--1' GROUP BY default_campaign.id

Filename: /var/www/ociomania/modules/campaigns/models/campaign_m.php

Line Number: 61