Found a good short read about maintaining data integrity in #dynamodb databases using condition expressions in updates.
TL;DR version your records and use a condition expression on the version. A condition expression is different from a key condition – the key condition identifies the item, the condition expression evaluates to true or false after identifying the item. If false, a CCF is thrown!
https://blog.awsfundamentals.com/understanding-and-handling-race-conditions-at-dynamodb
Hype Cycles 