Don't download this version until you have deleted the price from every billing plan. This version changes the type of this field, and the type can't be changed until every billing plan entity is edited, the price is made empty, and the billing plan is saved. Be sure to backup your DB before attempting an upgrade. After downloading this version, run drush entity-updates to apply the changes to the data schema.
New configuration
Note the new configuration that you'll need to import with this version: