Comparison Set returns -1

If you find your Comparison Sets have been replaced with "-1" here are the steps to resolve this issue.

First, please add the following code to your custom plugin (How to create a custom plugin):

add_filter( 'dfrcs_bots', function () {
	return [];
} );

Second, if adding the above code does not resolve the issue, please go here WordPress Admin Area > Datafeedr API > Comparison Sets and set the Display Method to "PHP".