diff --git a/app/extensions/app_languages.php b/app/extensions/app_languages.php
index a7bcd6e3db..4792b88673 100644
--- a/app/extensions/app_languages.php
+++ b/app/extensions/app_languages.php
@@ -1598,4 +1598,4 @@ $text['button-call_routing']['ro'] = "rutare de apel";
 $text['button-call_routing']['ar-eg'] = "توجيه الدعوة";
 $text['button-call_routing']['he'] = "ניתוב שיחות";
 
-?>
\ No newline at end of file
+?>
diff --git a/app/extensions/extension_copy.php b/app/extensions/extension_copy.php
index 1f9a8d3563..c1047cf469 100644
--- a/app/extensions/extension_copy.php
+++ b/app/extensions/extension_copy.php
@@ -47,7 +47,21 @@ else {
 			$number_alias_new = check_str($_REQUEST["alias"]);
 		}
 	}
-
+	
+// skip clone if domain:extension already exists
+	$ext = new extension;
+	$ext->db = $db;
+	if ($ext->exists($domain_uuid, $extension_new)) {
+		//begin the page content
+		require_once "resources/header.php";
+		
+		echo "<div align='center'>".$text['error-extension-copy-already-exists']."<br />";
+		echo "	<input type='button' class='btn' alt='".$text['button-back']."' onclick=\"window.location='./extension_edit.php?id=".$extension_uuid."';\" value='".$text['button-back']."'>\n";
+		echo "</div>";
+		require_once "resources/footer.php";
+		return;
+	}
+	
 //get the v_extensions data
 	$sql = "select * from v_extensions ";
 	$sql .= "where domain_uuid = '$domain_uuid' ";
@@ -228,4 +242,4 @@ else {
 	header("Location: extensions.php");
 	return;
 
-?>
\ No newline at end of file
+?>
diff --git a/app/extensions/resources/classes/extension.php b/app/extensions/resources/classes/extension.php
index 061b7180f7..0bee12ebcd 100644
--- a/app/extensions/resources/classes/extension.php
+++ b/app/extensions/resources/classes/extension.php
@@ -504,6 +504,18 @@ if (!class_exists('extension')) {
 					$_SESSION["reload_xml"] = true;
 			}
 		}
+
+		// returns true if domain:extension already exists
+		public function exists($domain_uuid, $extension) {
+			$sql = "select * from v_extensions where domain_uuid = '".$domain_uuid."' ";
+			$sql .= "and extension='".$extension."'";
+			
+			$prep_statement = $this->db->prepare(check_sql($sql));
+			$prep_statement->execute();
+			$result = $prep_statement->fetchAll(PDO::FETCH_NAMED);
+			
+			return count($result) != 0;
+		}
 	}
 }