How to automatically change slugs to match titles for Soliloquy sliders. https://sridharkatakam.com/automatically-change-slugs-match-titles-soliloquy-sliders/

functions.php

// Updates slug to match title for Soliloquy sliders
function sk_force_update_slug( $data, $postarr ) {

	if ( 'soliloquy' === $postarr['post_type'] && ! in_array( $data['post_status'], array( 'draft', 'pending', 'auto-draft' ) ) ) {
		$data['post_name'] = sanitize_title( $data['post_title'] );
	}

	return $data;

}
add_filter( 'wp_insert_post_data', 'sk_force_update_slug', 99, 2 );