Aggregate error: index file timestamp is earlier than the timestamp of the Aggregator transformation or mapping.
You modified a mapping containing an Aggregator transformation or modified the Aggregator transformation. Then, when you ran the incremental aggregation session, the Integration Service tried to reuse the existing cache file that was invalid with the Aggregator modifications.
The mapping and Aggregator transformation timestamp must be earlier than the cache file. Either reinitialize the aggregate cache or delete the cache file manually.