diff --git a/ChangeLog b/ChangeLog
index 6165077d1ca..c014d2890b5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -27,6 +27,7 @@ Fix: [ bug #2570 ] [Contacts] Page should not process if ID is invalid
 Fix: [ bug #3268 ] SQL error when accessing thirdparty log page without a socid parameter
 Fix: [ bug #3180 ] formObjectOptions hook when editing thirdparty card does not print result
 Fix: [ bug #1791 ] Margin menu not available if any Finance module is not enabled
+Fix: [ bug #3206 ] PropaleLigne, OrderLine and FactureLigne given to triggers through update function does not contain all the information
 
 ***** ChangeLog for 3.5.6 compared to 3.5.5 *****
 Fix: Avoid missing class error for fetch_thirdparty method #1973
diff --git a/htdocs/comm/propal/class/propal.class.php b/htdocs/comm/propal/class/propal.class.php
index 1a800dbf944..421e98b7c2a 100644
--- a/htdocs/comm/propal/class/propal.class.php
+++ b/htdocs/comm/propal/class/propal.class.php
@@ -528,13 +528,14 @@ class Propal extends CommonObject
                 $price = $pu - $remise;
             }
 
-            // Update line
-            $this->line=new PropaleLigne($this->db);
+            //Fetch current line from the database and then clone the object and set it in $oldline property
+            $line = new PropaleLigne($this->db);
+            $line->fetch($rowid);
 
-            // Stock previous line records
-            $staticline=new PropaleLigne($this->db);
-            $staticline->fetch($rowid);
-            $this->line->oldline = $staticline;
+            $staticline = clone $line;
+
+            $line->oldline = $staticline;
+            $this->line = $line;
 
             // Reorder if fk_parent_line change
             if (! empty($fk_parent_line) && ! empty($staticline->fk_parent_line) && $fk_parent_line != $staticline->fk_parent_line)
diff --git a/htdocs/commande/class/commande.class.php b/htdocs/commande/class/commande.class.php
index d1a776d3d24..78a5a89047a 100644
--- a/htdocs/commande/class/commande.class.php
+++ b/htdocs/commande/class/commande.class.php
@@ -2349,13 +2349,14 @@ class Commande extends CommonOrder
                 $price = ($pu - $remise);
             }
 
-            // Update line
-            $this->line=new OrderLine($this->db);
+            //Fetch current line from the database and then clone the object and set it in $oldline property
+            $line = new OrderLine($this->db);
+            $line->fetch($rowid);
 
-            // Stock previous line records
-            $staticline=new OrderLine($this->db);
-            $staticline->fetch($rowid);
-            $this->line->oldline = $staticline;
+            $staticline = clone $line;
+
+            $line->oldline = $staticline;
+            $this->line = $line;
 
             // Reorder if fk_parent_line change
             if (! empty($fk_parent_line) && ! empty($staticline->fk_parent_line) && $fk_parent_line != $staticline->fk_parent_line)
diff --git a/htdocs/compta/facture/class/facture.class.php b/htdocs/compta/facture/class/facture.class.php
index 0d91d7944b8..eaa4c183a29 100644
--- a/htdocs/compta/facture/class/facture.class.php
+++ b/htdocs/compta/facture/class/facture.class.php
@@ -2224,13 +2224,14 @@ class Facture extends CommonInvoice
 			}
 			$price    = price2num($price);
 
-			// Update line into database
-			$this->line=new FactureLigne($this->db);
+			//Fetch current line from the database and then clone the object and set it in $oldline property
+			$line = new FactureLigne($this->db);
+			$line->fetch($rowid);
 
-			// Stock previous line records
-			$staticline=new FactureLigne($this->db);
-			$staticline->fetch($rowid);
-			$this->line->oldline = $staticline;
+			$staticline = clone $line;
+
+			$line->oldline = $staticline;
+			$this->line = $line;
 
 			// Reorder if fk_parent_line change
 			if (! empty($fk_parent_line) && ! empty($staticline->fk_parent_line) && $fk_parent_line != $staticline->fk_parent_line)