To address this issue, follow these steps:

1. Insert the below provided code into the functions.php file of your currently active theme.
2. Afterward, navigate to the settings page of the catalog enquiry plugin and refresh it.
3. Once the process is complete, remember to remove the added code from the functions.php file in your active theme.

add_action(‘init’, ‘fix_catalog_issue’); 

function fix_catalog_issue(){  

 delete_option(‘mvx_catalog_pro_enquiry_form_data’);

 }