Fix error message

htdocs/accountancy/admin/card.php

@@ -168,10 +168,13 @@ if ($action == 'add' && $user->rights->accounting->chartofaccount) {
 			$object->labelshort = GETPOST('labelshort', 'alpha');
 
 			$result = $object->update($user);
+
 			if ($result > 0) {
 				$urltogo = $backtopage ? $backtopage : ($_SERVER["PHP_SELF"] . "?id=" . $id);
 				header("Location: " . $urltogo);
 				exit();
+			} elseif ($result == -2) {
+				setEventMessages($langs->trans("ErrorAccountNumberAlreadyExists", $object->account_number), null, 'errors');
 			} else {
 				setEventMessages($object->error, null, 'errors');
 			}

htdocs/accountancy/class/accountingaccount.class.php

@@ -347,8 +347,8 @@ class AccountingAccount extends CommonObject
 	/**
 	 * Update record
 	 *
-	 * @param User $user Use making update
-	 * @return int             <0 if KO, >0 if OK
+	 * @param User $user 		User making update
+	 * @return int             	<0 if KO (-2 = duplicate), >0 if OK
 	 */
 	public function update($user)
 	{
@@ -378,6 +378,12 @@ class AccountingAccount extends CommonObject
 			$this->db->commit();
 			return 1;
 		} else {
+			if ($this->db->lasterrno() == 'DB_ERROR_RECORD_ALREADY_EXISTS') {
+				$this->error = $this->db->lasterror();
+				$this->db->rollback();
+				return -2;
+			}
+
 			$this->error = $this->db->lasterror();
 			$this->db->rollback();
 			return -1;

htdocs/langs/en_US/accountancy.lang

@@ -427,6 +427,7 @@ SorryThisModuleIsNotCompatibleWithTheExperimentalFeatureOfSituationInvoices=Sorr
 AccountancyErrorMismatchLetterCode=Mismatch in reconcile code
 AccountancyErrorMismatchBalanceAmount=The balance (%s) is not equal to 0
 AccountancyErrorLetteringBookkeeping=Errors have occurred concerning the transactions: %s
+ErrorAccountNumberAlreadyExists=The accounting number %s already exists
 
 ## Import
 ImportAccountingEntries=Accounting entries