Error: DynamoDB Get not found

A successful GetItem request with no Item means no matching item was returned. ResourceNotFoundException is different: check the table or resource, account and Region.

Supply the complete primary key, including the sort key when present, with the same attribute types used in the table. A String value of "123" is different from Number 123. If you just wrote the item, use a strongly consistent base-table read when you need to observe that write immediately.

Do not insert a replacement merely to hide a failed lookup. Check TTL deletion, the actual write result and whether your request targets a different replica or local endpoint. See a complete GetItem example.