Enforces conflict checking when updating an existing data item. This field should be omitted when creating a new data item. When updating an existing item, omitting this field ignores write conflicts. When present, an error response will be returned if the writeLock in the request does not match the stored writeLock.
Documentation
Enforces conflict checking when updating an existing data item. This field should be omitted when creating a new data item. When updating an existing item, omitting this field ignores write conflicts. When present, an error response will be returned if the writeLock in the request does not match the stored writeLock.
SetItemResponse