Overwriting Entries From Users Who Have Already Submitted a Form

/*

 * Remove all user entries before saving the entry - this is for all forms.

 *

 * @link https://wpforms.com/developers/how-to-overwrite-entries-from-users-who-have-already-submitted-a-form/

 */

function remove_all_before_entry_save( $fields, $entry, $form_id ) {

        //get the current user's user ID

    $user_id = get_current_user_id();

        //check if the user is logged in, if not logged in skip this code snippet all together

    if ( empty( $user_id ) ) {

        return;

    }

        //perform a query for any entries submitted on this form by this user ID

    $entries = wpforms()->entry->get_entries(

        [

            'form_id' => $form_id,

            'user_id' => $user_id,

            'number'  => -1,

            'select'  => 'entry_ids',

            'cap'     => false,

        ]

    );

        //for any previous entries this user has submitted on this form, remove them and replace them with this entry only 

    foreach ( $entries as $_entry ) {

        wpforms()->entry->delete( $_entry->entry_id, [ 'cap' => false ] );

    }

}

add_action( 'wpforms_process_entry_save', 'remove_all_before_entry_save', 9, 3 );