diff --git a/ChangeLog b/ChangeLog
index 2bf1a93f460..3ecdc4d0c54 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -357,6 +357,41 @@ Following changes may create regressions for some external modules, but were nec
   multicompany module to a version that support Dolibarr v7, everything should work as expected. 
 
 
+
+***** ChangeLog for 6.0.6 compared to 6.0.6 *****
+FIX: #7974 Contract - Invalid reference on the document
+FIX: #8139
+FIX: #8139 User search does not work if MAIN_USE_OLD_SEARCH_FORM, missing list.php
+FIX: #8151
+FIX: #8200
+FIX: add planned delivery to order exports
+FIX: a discount is a percent, not an amount, so we use vatrate not price
+FIX: Avoid empty value to fk_multicurrency attribute
+FIX: Bad localtaxes assignment in cashdesk
+FIX: check shipping on delete order
+FIX: check verif exped on delete order
+FIX: creer into lire
+FIX: Delete tasks on project delete will now trigger TASK_DELETE
+FIX: Global on $user parameter reset the variable
+FIX: if we make a mistake with situation_percent, now we can correct…
+FIX: if we make a mistake with situation_percent, now we can correct it. before situation_final was always set to 1 and no way to go back
+FIX: Import process must stop after ending line nb to import
+FIX: migration script for product photo
+FIX: natural search double quote
+FIX: reverse field to have object loaded in doaction
+FIX: Saving wrong localtax on order addline
+FIX: show status on societe banner
+FIX: solve column mismatch in user card's usergroup list + code cleanup
+FIX: solve column mismatch in user card with multicompany transverse mode + code cleanup
+FIX: unset categorie
+FIX: update_extras on fourn card
+FIX: warning when adding ECM files using old photo path
+FIX: Withdrawals lines not filter by company name and not respect dropdown limit lines by page
+NEW: Add sale representative einstein_pdf_modules
+NEW_einstein_pdf_modules
+NEW: field commerciaux and categ export CustomersInvoicesAndPayments
+
+
 ***** ChangeLog for 6.0.5 compared to 6.0.4 *****
 FIX: security vulnerability reported by ADLab of Venustech
      CVE-2017-17897, CVE-2017-17898, CVE-2017-17899, CVE-2017-17900 
diff --git a/htdocs/contrat/card.php b/htdocs/contrat/card.php
index 9d504aae6e4..91738ac81be 100644
--- a/htdocs/contrat/card.php
+++ b/htdocs/contrat/card.php
@@ -930,19 +930,35 @@ if (empty($reshook))
 				setEventMessages($object->error, $object->errors, 'errors');
 			}
 
-			$result = $object->setValueFrom('ref', GETPOST('ref','alpha'), '', null, 'text', '', $user, 'CONTRACT_MODIFY');
-			if ($result < 0) {
-				setEventMessages($object->error, $object->errors, 'errors');
-				$action = 'editref';
-			} else {
-				header("Location: " . $_SERVER['PHP_SELF'] . "?id=" . $object->id);
-				exit;
-			}
-		}
-		else {
-			header("Location: " . $_SERVER['PHP_SELF'] . "?id=" . $id);
-			exit;
-		}
+			$old_ref = $object->ref;
+
+	        $result = $object->setValueFrom('ref', GETPOST('ref','alpha'), '', null, 'text', '', $user, 'CONTRACT_MODIFY');
+	        if ($result < 0) {
+	            setEventMessages($object->error, $object->errors, 'errors');
+	            $action = 'editref';
+	        } else {
+				require_once DOL_DOCUMENT_ROOT.'/core/lib/files.lib.php';
+				$old_filedir = $conf->contrat->dir_output . '/' . dol_sanitizeFileName($old_ref);
+				$new_filedir = $conf->contrat->dir_output . '/' . dol_sanitizeFileName($object->ref);
+
+				$files = dol_dir_list($old_filedir);
+				if (!empty($files))
+				{
+					if (!is_dir($new_filedir)) dol_mkdir($new_filedir);
+					foreach ($files as $file)
+					{
+						dol_move($file['fullname'], $new_filedir.'/'.$file['name']);
+					}
+				}
+
+	            header("Location: " . $_SERVER['PHP_SELF'] . "?id=" . $object->id);
+	            exit;
+	        }
+	    }
+	    else {
+	        header("Location: " . $_SERVER['PHP_SELF'] . "?id=" . $id);
+	        exit;
+	    }
 	}
 	elseif ($action=='setdate_contrat')
 	{