Error on node edition after upgrade from D6

on the working website contextual links are available but not on the 2 that doesn't work..perhaps a clue
EDIt: wrong name module,it work after enable contextual...so still searching

more information :

PDOException : SQLSTATE[HY000]: General error: 1366 Incorrect integer value: '' for column 'field_illustration_vdl_width' at row 1: INSERT INTO {field_data_field_illustration_vdl} (entity_type, entity_id, revision_id, bundle, delta, language, field_illustration_vdl_fid, field_illustration_vdl_alt, field_illustration_vdl_title, field_illustration_vdl_width, field_illustration_vdl_height) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2, :db_insert_placeholder_3, :db_insert_placeholder_4, :db_insert_placeholder_5, :db_insert_placeholder_6, :db_insert_placeholder_7, :db_insert_placeholder_8, :db_insert_placeholder_9, :db_insert_placeholder_10); Array ( [:db_insert_placeholder_0] => node [:db_insert_placeholder_1] => 90 [:db_insert_placeholder_2] => 91 [:db_insert_placeholder_3] => contenu_sortie_action [:db_insert_placeholder_4] => 0 [:db_insert_placeholder_5] => und [:db_insert_placeholder_6] => 230 [:db_insert_placeholder_7] => [:db_insert_placeholder_8] => [:db_insert_placeholder_9] => [:db_insert_placeholder_10] => ) dans field_sql_storage_field_storage_write() (ligne 451 dans /var/www/drupal7/modules/field/modules/field_sql_storage/field_sql_storage.module).

this seem to be only on imagefield or filefield, because viewreference field or content taxonomy field doesn't break the node after edition.
Why the upgrade doesn't preserve node on edition after migration fields done ?