diff --git a/htdocs/adherents/class/adherent.class.php b/htdocs/adherents/class/adherent.class.php
index 29cc0aac249..de3b937094a 100644
--- a/htdocs/adherents/class/adherent.class.php
+++ b/htdocs/adherents/class/adherent.class.php
@@ -1991,12 +1991,14 @@ class Adherent extends CommonObject
 
 		// Process
 		foreach ($to_del as $del) {
-			$c->fetch($del);
-			$c->del_type($this, 'member');
+			if ($c->fetch($del) > 0) {
+				$c->del_type($this, 'member');
+			}
 		}
 		foreach ($to_add as $add) {
-			$c->fetch($add);
-			$c->add_type($this, 'member');
+			if ($c->fetch($add) > 0) {
+				$c->add_type($this, 'member');
+			}
 		}
 
 		return;
diff --git a/htdocs/contact/class/contact.class.php b/htdocs/contact/class/contact.class.php
index c48408ab281..7af2a763ad1 100644
--- a/htdocs/contact/class/contact.class.php
+++ b/htdocs/contact/class/contact.class.php
@@ -1155,12 +1155,14 @@ class Contact extends CommonObject
 
 		// Process
 		foreach ($to_del as $del) {
-			$c->fetch($del);
-			$c->del_type($this, 'contact');
+			if ($c->fetch($del) > 0) {
+				$c->del_type($this, 'contact');
+			}
 		}
 		foreach ($to_add as $add) {
-			$c->fetch($add);
-			$c->add_type($this, 'contact');
+			if ($c->fetch($add) > 0) {
+				$c->add_type($this, 'contact');
+			}
 		}
 
 		return;
diff --git a/htdocs/product/class/product.class.php b/htdocs/product/class/product.class.php
index a51a1a77c7b..6f4e37c8ab2 100644
--- a/htdocs/product/class/product.class.php
+++ b/htdocs/product/class/product.class.php
@@ -3976,12 +3976,14 @@ class Product extends CommonObject
 
 		// Process
 		foreach($to_del as $del) {
-			$c->fetch($del);
-			$c->del_type($this, 'product');
+			if ($c->fetch($del) > 0) {
+				$c->del_type($this, 'product');
+			}
 		}
 		foreach ($to_add as $add) {
-			$c->fetch($add);
-			$c->add_type($this, 'product');
+			if ($c->fetch($add) > 0) {
+				$c->add_type($this, 'product');
+			}
 		}
 
 		return;
diff --git a/htdocs/societe/class/societe.class.php b/htdocs/societe/class/societe.class.php
index af54c7b8742..7bf8d6c45cf 100644
--- a/htdocs/societe/class/societe.class.php
+++ b/htdocs/societe/class/societe.class.php
@@ -3395,12 +3395,14 @@ class Societe extends CommonObject
 
 		// Process
 		foreach ($to_del as $del) {
-			$c->fetch($del);
-			$c->del_type($this, $type_text);
+			if ($c->fetch($del) > 0) {
+				$c->del_type($this, $type_text);
+			}
 		}
 		foreach ($to_add as $add) {
-			$c->fetch($add);
-			$c->add_type($this, $type_text);
+			if ($c->fetch($add) > 0) {
+				$c->add_type($this, $type_text);
+			}
 		}
 
 		return;