During a subscription sync, the following events can occur:

• A check for a SKU is performed.  The SKU is not found
• A value of "false" for that SKU is written to the cache that stores the existence of SKUs
• We save an offering with that SKU
• Another subscription with the same SKU comes along and we make another call to OfferingRepository.existsById
• The cache returns false instead of true because we did not update the offering existence cache after saving the offering