title: Invalid default value for 'date_available'
body: <p>I am trying to alter catalog_no, but while altering it I am getting error regarding 'date_available' column</p>
  
  <p>My SQL for altering catalog_no is:</p>
  
  <pre><code>ALTER TABLE `product` CHANGE `catalog_no` `catalogno` VARCHAR(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL;
  </code></pre>
  
  <p>But this is giving me error <code>#1067- Invalid default value for 'date_available'</code></p>
  
  <p>What is the reason for this error and how can I solve it, Please help.</p>
  
  <p>Thanks</p>