diff --git a/htdocs/fourn/class/fournisseur.product.class.php b/htdocs/fourn/class/fournisseur.product.class.php
index 069380249db..ce3eb33cce5 100644
--- a/htdocs/fourn/class/fournisseur.product.class.php
+++ b/htdocs/fourn/class/fournisseur.product.class.php
@@ -395,7 +395,6 @@ class ProductFournisseur extends Product
 				return -2;
 			}
         }
-
         else
         {
             dol_syslog(get_class($this).'::update_buyprice without knowing id of line, so we delete from company, quantity and supplier_ref and insert again', LOG_DEBUG);
@@ -438,11 +437,11 @@ class ProductFournisseur extends Product
                 $sql .= (empty($fk_barcode_type) ? 'NULL' : "'".$this->db->escape($fk_barcode_type)."'");
                 $sql .= ")";
 
-                $idinserted = 0;
+				$this->product_fourn_price_id = 0;
 
                 $resql = $this->db->query($sql);
                 if ($resql) {
-                    $idinserted = $this->db->last_insert_id(MAIN_DB_PREFIX."product_fournisseur_price");
+                    $this->product_fourn_price_id = $this->db->last_insert_id(MAIN_DB_PREFIX . "product_fournisseur_price");
                 }
                 else {
                     $error++;
@@ -450,6 +449,7 @@ class ProductFournisseur extends Product
 
                 if (!$error && empty($conf->global->PRODUCT_PRICE_SUPPLIER_NO_LOG)) {
                     // Add record into log table
+					// $this->product_fourn_price_id must be set
                     $result = $this->logPrice($user, $now, $buyprice, $qty, $multicurrency_buyprice, $multicurrency_unitBuyPrice, $multicurrency_tx, $fk_multicurrenc, $multicurrency_code);
                     if ($result < 0) {
                         $error++;
@@ -465,7 +465,6 @@ class ProductFournisseur extends Product
 
                     if (empty($error)) {
                         $this->db->commit();
-						$this->product_fourn_price_id = $idinserted;
                         return $this->product_fourn_price_id;
                     } else {
                         $this->db->rollback();
diff --git a/htdocs/projet/tasks/document.php b/htdocs/projet/tasks/document.php
index 1944de13f61..133b3d3d509 100644
--- a/htdocs/projet/tasks/document.php
+++ b/htdocs/projet/tasks/document.php
@@ -284,9 +284,11 @@ if ($object->id > 0)
 	    $morehtmlref.='<br>';
 
 	    // Third party
-	    $morehtmlref.=$langs->trans("ThirdParty").': ';
-	    $morehtmlref.=$projectstatic->thirdparty->getNomUrl(1);
-	    $morehtmlref.='</div>';
+	    $morehtmlref .= $langs->trans("ThirdParty") . ': ';
+	    if (is_object($projectstatic->thirdparty) && $projectstatic->thirdparty->id > 0) {
+	    	$morehtmlref .= $projectstatic->thirdparty->getNomUrl(1);
+	    }
+	    $morehtmlref .= '</div>';
 	}
 
 	dol_banner_tab($object, 'ref', $linkback, 1, 'ref', 'ref', $morehtmlref, $param);