title: Error: One or more parameter values were invalid--DynamoDb
body: <p>I am trying to update a table in DynamoDb with the following code..</p>
  
  <pre><code>$response = $client-&gt;updateItem(array(
      "TableName" =&gt; "PlayerInfo",
      "Key" =&gt; array(
          "PlayerId" =&gt; array('N' =&gt; '201503261435580358849074082'),
      ),
      "AttributeUpdates" =&gt; array(
          'PlayerPrice' =&gt; array(
              'N' =&gt; '5'
          ),
      ),
      "ReturnValues" =&gt; \Aws\DynamoDb\Enum\ReturnValue::ALL_NEW
  ));
  
  print_r($response);
  </code></pre>
  
  <p>However, an error interrupts its execution. It says:</p>
  
  <pre><code>One or more parameter values were invalid: Only DELETE action is allowed 
  when no attribute value is specified.
  </code></pre>
  
  <p>Could anybody help me with this issue?</p>