diff --git a/front/js/db_methods.js b/front/js/db_methods.js
index 9938e55a..98885527 100755
--- a/front/js/db_methods.js
+++ b/front/js/db_methods.js
@@ -27,7 +27,7 @@ function checkDbLock() {
         type: 'GET',
         
         success: function(response) {
-            // console.log(response);   
+            console.log(response);   
             if (response == 0) {
                 // console.log('Database is not locked');
                 $(".header-status-locked-db").hide()  
diff --git a/front/php/components/logs_defaults.json b/front/php/components/logs_defaults.json
index 882ce209..825c5fe6 100755
--- a/front/php/components/logs_defaults.json
+++ b/front/php/components/logs_defaults.json
@@ -66,6 +66,13 @@
         "filePath": "/app/front/log/app_front.log",
         "textAreaCssClass": "logs logs-small"
     },
+    {
+        "buttons": [
+        ],
+        "fileName": "db_is_locked.log",
+        "filePath": "/app/front/log/db_is_locked.log",
+        "textAreaCssClass": "logs logs-small"
+    },
     {
         "buttons": [
             {
diff --git a/front/php/server/devices.php b/front/php/server/devices.php
index 2bdcfd92..82022a48 100755
--- a/front/php/server/devices.php
+++ b/front/php/server/devices.php
@@ -901,18 +901,11 @@ function copyFromDevice() {
 
   $MAC_FROM = $_REQUEST['macFrom'];
   $MAC_TO   = $_REQUEST['macTo'];
-
-  if ((false === filter_var($MAC_FROM , FILTER_VALIDATE_MAC) && $MAC_FROM != "Internet" && $MAC_FROM != "")  ) {
-    throw new Exception('Invalid mac address');
-  }
-  if ((false === filter_var($MAC_TO , FILTER_VALIDATE_MAC) && $MAC_TO != "Internet" && $MAC_TO != "")  ) {
-    throw new Exception('Invalid mac address');
-  }
   
   global $db;
 
   // clean-up temporary table  
-  $sql = "DROP TABLE temp_devices ";
+  $sql = "DROP TABLE IF EXISTS temp_devices ";
   $result = $db->query($sql);
 
   // create temporary table with the source data