J'ai résolu ce problème en procédant comme suit:
1.- supprimer la table customer_grid_flat
2.- Recréez le tableau:
CREATE TABLE IF NOT NOT EXISTS customer_grid_flat(
entity_idint UNSIGNED NOT NULL COMMENTAIRE 'ID de l'entité',
nametexte NULL COMMENTAIRE 'Nom',
emailvarchar (255) NULL COMMENTAIRE 'Email',
group_idint NULL COMMENTAIRE 'Group_id',
created_athorodatage NULL par défaut NULL COMMENTAIRE 'Created_at',
website_idint NULL COMMENTAIRE 'Website_id',
confirmationvarchar (255) NULL COMMENTAIRE 'Confirmation',
created_intexte NULL COMMENTAIRE 'Created_in',
dobdate NULL COMMENTAIRE 'Dob',
genderint NULL COMMENTAIRE 'Genre',
taxvatvarchar (255) NULL COMMENTAIRE 'Taxvat',
lock_expireshorodatage NULL default NULL COMMENTAIRE 'Lock_expires',
shipping_fulltexte NULL COMMENTAIRE 'Shipping_full',
billing_fulltexte NULL COMMENTAIRE '
Billing_full ', billing_firstnamevarchar (255) NULL COMMENT' Billing_firstname ',
billing_lastnamevarchar (255) NULL COMMENTAIRE 'Billing_lastname',
billing_telephonevarchar (255) NULL COMMENTAIRE 'Billing_telephone',
billing_postcodevarchar (255) NULL COMMENTAIRE 'Billing_postcode',
billing_country_idvarchar (255) NULL COMMENTAIRE 'Billing_country_id',
billing_regionvarchar (255) NULL COMMENT ', Billing_region',
billing_streetvarchar (255) NULL COMMENTAIRE 'Billing_street',
billing_cityvarchar (255) NULL COMMENTAIRE 'Billing_city',
billing_faxvarchar (255) NULL COMMENTAIRE 'Billing_fax',
billing_vat_idvarchar (255) NULL COMMENTAIRE 'Billing_vat_id',
billing_companyvarchar (255) NULL COMMENTAIRE 'Billing_company', Varchar (255) NULL COMMENTAIRE ' PRIMARY KEY ( entity_id), INDEX CUSTOMER_GRID_FLAT_GROUP_ID( group_id), INDEX CUSTOMER_GRID_FLAT_CREATED_AT( created_at), INDEX CUSTOMER_GRID_FLAT_WEBSITE_ID( website_id), INDEX CUSTOMER_GRID_FLAT_CONFIRMATION( confirmation),INDEX CUSTOMER_GRID_FLAT_DOB( dob), INDEXCUSTOMER_GRID_FLAT_GENDER( gender), INDEX CUSTOMER_GRID_FLAT_BILLING_COUNTRY_ID( billing_country_id), FULLTEXT FTI_8746F705702DD5F6D45B8C7CE7FE9F2F( name, email, created_in, taxvat, shipping_full, billing_full, billing_firstname, billing_lastname, billing_telephone, billing_postcode, billing_region, billing_city, billing_fax, billing_company)) COMMENT = 'customer_grid_flat' MOTEUR = innodb charset = UTF - 8 ASSEMBLER = utf8_general_ci