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Based on the knowledge sources provided, it appears that running the same Airbyte connection concurrently can lead to issues, including HTTP 409 errors. Let me explain why this happens and what you can do about it: 1. Concurrent Sync Conflict: When you try to run the same connection simultaneously, Airbyte detects that a sync is already in progress and prevents the second sync from starting. This results in a 409 Conflict error. As mentioned in the [Forum Post: When click "sync now" the connection got stuck throwing error](https://discuss.airbyte.io/t/3336), users have encountered the following error message: "A sync is already running for: [connection_id]" 2. Recommended Approach: To avoid these conflicts, it's generally recommended not to run the same connection concurrently. Instead, you should wait for one sync to complete before starting another for the same connection. 3. Alternative Solutions: If you need to sync data from the same source more frequently or in parallel, consider these options: a. Multiple Connections: As suggested in the [Forum Post: Does running multiple connections to the same data source help with parallelisation/performance?](https://discuss.airbyte.io/t/1863), you can set up separate connections for different tables or groups of tables. This approach can help with performance and parallelization, especially for large datasets. b. Adjust Sync Frequency: Instead of running concurrent syncs, you could increase the sync frequency for your connection to ensure more up-to-date data. 4. Potential Risks: Running multiple connections to the same destination can lead to other issues. As noted in the [Forum Post: Destination S3 key error when moving large amount of data](https://discuss.airbyte.io/t/1489), concurrent connections to the same destination (e.g., S3 bucket) can interfere with each other, potentially causing data loss or corruption. In conclusion, while it's not recommended to run the same Airbyte connection concurrently due to sync conflicts and potential data issues, you can explore alternative approaches like creating multiple connections or adjusting sync frequencies to meet your data integration needs.