Is there a way to update post meta schema after meta fields have been saved for a wordpress post

Question

I have register a post meta field called project_description with it's explicit 'schema' in register_post_meta function. The following is register_post_meta function -

function register_project_description_post_meta() {
    register_block_type( plugin_dir_path( __FILE__) . 'build/project-description' );

    register_post_meta('project', 'project_description', array(
        'single' => true,
        'type' => 'object',
        'show_in_rest' => array(
            'schema' => array(
                'type' =>'object',
                'properties' => array(
                    'excerpt' => array(
                        'type' => 'object',
                        'properties' => array(
                            'title' => array(
                                'type' => 'string'
                            ),
                            'description' => array(
                                'type' => 'string'
                            )
                        )
                    ),
                    'responsive' => array(
                        'type' => 'object',
                        'properties' => array(
                            'title' => array(
                                'type' => 'string'
                            ),
                            'description' => array(
                                'type' => 'string'
                            ),
                            'image' => array(
                                'type' => 'string',
                                'properties' => array(
                                    'id' => array(
                                        'type' => 'integer'
                                    ),
                                    'url' => array(
                                        'type' => 'string'
                                    )
                                )
                            )
                        )
                    )
                                )
                        )
        )
    ));
}

Now when I change the image property with type string instead of object I get project_description: null when calling REST API in Postman.

So I want to know is there a way to change the schema when a post already has that meta field. That is, after the schema change the meta field should look like this -

project_description: {
   excerpt: {
      title: '',
      description: '',
   },
   responsive: {
      title: '',
      description: '',
      image: ''
   }
}

instead of

project_description: {
   excerpt: {
      title: '',
      description: '',
   },
   responsive: {
      title: '',
      description: '',
      image: {
        id: '',
        url: ''
      }
   }
}