diff --git a/README.md b/README.md
index 58cb0f7..12c20ea 100644
--- a/README.md
+++ b/README.md
@@ -88,7 +88,6 @@ php src/cli/document/crawl.php
 php src/cli/document/clean.php
 ```
 
-* remove `url` duplicates
 * make index optimization
 
 ##### Search
diff --git a/src/cli/document/add.php b/src/cli/document/add.php
index 4e62fe0..53ae617 100644
--- a/src/cli/document/add.php
+++ b/src/cli/document/add.php
@@ -29,7 +29,7 @@ $crc32url = crc32($url);
 
 // Check URL for exist
 $result = $index->search('')
-                ->filter('crc32url', $crc32url)
+                ->filter('id', $crc32url)
                 ->limit(1)
                 ->get();
 
@@ -47,9 +47,9 @@ if ($result->getTotal())
 // Add
 $result = $index->addDocument(
     [
-        'url'      => $url,
-        'crc32url' => $crc32url
-    ]
+        'url' => $url
+    ],
+    $crc32url
 );
 
 echo sprintf(
diff --git a/src/cli/document/clean.php b/src/cli/document/clean.php
index 8e85d6a..a2e86b8 100644
--- a/src/cli/document/clean.php
+++ b/src/cli/document/clean.php
@@ -36,57 +36,6 @@ $index = $client->index(
     $config->manticore->index->document->name
 );
 
-// Get totals
-$total = $index->search('')
-               ->option('cutoff', 0)
-               ->limit(0)
-               ->get()
-               ->getTotal();
-
-// Delete duplicates #5
-$delete = [];
-
-foreach($index->search('')->limit($total)->get() as $queue)
-{
-    $duplicates = $index->search('')->filter('crc32url', $queue->crc32url)->limit($total)->get();
-
-    if ($duplicates->getTotal() > 1)
-    {
-        foreach ($duplicates as $duplicate)
-        {
-            $delete[$duplicate->crc32url][] = $duplicate->getId();
-        }
-    }
-}
-
-$i = 0;
-foreach ($delete as $crc32url => $ids)
-{
-    $j = 0;
-    foreach ($ids as $id)
-    {
-        $i++;
-        $j++;
-
-        // Skip first link
-        if ($j == 1) continue;
-
-        // Delete duplicate
-        $index->deleteDocument($id);
-    }
-}
-
-// Free mem
-$delete = [];
-
-// @TODO $config->cli->document->crawl->skip->stripos->url
-
-// Dump operation result
-echo sprintf(
-    _('duplicated URLs deleted: %s') . PHP_EOL,
-    number_format($i)
-);
-
 // Optimize indexes
 echo _('indexes optimization begin') . PHP_EOL;
 
diff --git a/src/cli/document/crawl.php b/src/cli/document/crawl.php
index 7a49873..82e1f87 100644
--- a/src/cli/document/crawl.php
+++ b/src/cli/document/crawl.php
@@ -98,7 +98,6 @@ foreach($index->search('')
     $data =
     [
         'url'         => $document->get('url'),
-        'crc32url'    => $document->get('crc32url'),
         'title'       => $document->get('title'),
         'description' => $document->get('description'),
         'keywords'    => $document->get('keywords'),
@@ -355,17 +354,20 @@ foreach($index->search('')
                     $crc32url = crc32($url);
 
                     if (!$index->search('')
-                               ->filter('crc32url', $crc32url)
+                               ->filter('id', $crc32url)
                                ->limit(1)
                                ->get()
                                ->getTotal())
                     {
+                        echo 'add';
+                        /*
                         $index->addDocument(
                             [
-                                'url'      => $url,
-                                'crc32url' => $crc32url
-                            ]
+                                'url' => $url
+                            ],
+                            $crc32url
                         );
+                        */
 
                         if ($config->cli->document->crawl->debug->level->notice)
                         {
@@ -383,10 +385,16 @@ foreach($index->search('')
 
         // Replace document data
         // https://github.com/manticoresoftware/manticoresearch-php/issues/10#issuecomment-612685916
+
+        // @TODO optimization for replacements required
+        // https://manual.manticoresearch.com/Data_creation_and_modification/Updating_documents/REPLACE
+        echo 'replace';
+        /*
         $result = $index->replaceDocument(
             $data,
             $document->getId()
         );
+        */
 
         // Debug result
         if ($config->cli->document->crawl->debug->level->notice)
diff --git a/src/cli/index/init.php b/src/cli/index/init.php
index 0c6fdb5..e35fd2c 100644
--- a/src/cli/index/init.php
+++ b/src/cli/index/init.php
@@ -79,10 +79,6 @@ $result = $index->create(
         'time' =>
         [
             'type' => 'integer'
-        ],
-        'crc32url' =>
-        [
-            'type' => 'bigint'
         ]
     ],
     (array) $config->manticore->index->document->settings
diff --git a/src/cli/yggo/import.php b/src/cli/yggo/import.php
index 7116cde..26a9a89 100644
--- a/src/cli/yggo/import.php
+++ b/src/cli/yggo/import.php
@@ -128,7 +128,7 @@ for ($i = 0; $i <= $total; $i++)
         if (isset($argv[6]))
         {
             $local = $index->search('')
-                           ->filter('crc32url', $crc32url)
+                           ->filter('id', $crc32url)
                            ->limit(1)
                            ->get();
 
@@ -149,7 +149,6 @@ for ($i = 0; $i <= $total; $i++)
         $index->addDocument(
             [
                 'url'         => $url,
-                'crc32url'    => (int) $crc32url,
                 'time'        => (int) $remote->timeUpdated,
                 'code'        => (int) $remote->httpCode,
                 'size'        => (int) $remote->size,
@@ -157,7 +156,8 @@ for ($i = 0; $i <= $total; $i++)
                 'title'       => (string) $remote->title,
                 'description' => (string) $remote->description,
                 'keywords'    => (string) $remote->keywords
-            ]
+            ],
+            (int) $crc32url
         );
 
         // Result
diff --git a/src/webui/search.php b/src/webui/search.php
index 64161a3..d2466c7 100644
--- a/src/webui/search.php
+++ b/src/webui/search.php
@@ -60,7 +60,7 @@ if ($config->webui->search->index->request->url->enabled && filter_var($q, FILTE
 
     // Check URL for exist
     $exist = $index->search('')
-                   ->filter('crc32url', $crc32url)
+                   ->filter('id', $crc32url)
                    ->limit(1)
                    ->get()
                    ->getTotal();
@@ -82,9 +82,9 @@ if ($config->webui->search->index->request->url->enabled && filter_var($q, FILTE
 
       $index->addDocument(
         [
-          'url'      => $url,
-          'crc32url' => $crc32url
-        ]
+          'url' => $url
+        ],
+        $crc32url
       );
 
       $response = sprintf(
@@ -113,7 +113,7 @@ switch (true)
 
   case filter_var($q, FILTER_VALIDATE_URL):
 
-    $query = $index->search('')->filter('crc32url', crc32($q));
+    $query = $index->search('')->filter('id', crc32($q));
 
   break;