diff --git a/htdocs/categories/categorie.class.php b/htdocs/categories/categorie.class.php
index 062e551801c..b14fdf65865 100644
--- a/htdocs/categories/categorie.class.php
+++ b/htdocs/categories/categorie.class.php
@@ -153,14 +153,7 @@ class Categorie
    */
   function update()
   {
-    $sql = 'delete from '.MAIN_DB_PREFIX.'categorie_association';
-    $sql .= ' WHERE fk_categorie_mere  = "'.$this->id.'" or fk_categorie_fille = "'.$this->id.'"';
 	
-    if (! $this->db->query($sql))
-    {
-	    dolibarr_print_error($this->db);
-	     return -1;
-    }
 	if($this->id_mere !="" && $this->id_mere!=$this->id)
 	{