Hi! We've actually done Sync CleanUp several times and we still get this error. We have a new user for Salesforce Sync and did CleanUp and Catalog sync, which always finish without errors. But since then, everytime Subscriptoin Charges are supposed to Sync, they fail with this error. The work around we got is accessing to Zuora Product Catalog, click on 'Edit' and 'Save' with no changes. After that, those Product Charges wont fail in future Subscription Syncs...
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