Hmm, I don't know enough to give you a confident answer yet. However, I can provide you with some general guidance on normalization issues. Normalization issues can occur due to various reasons, such as data type mismatches, incorrect configurations, or problems with the data itself. To better understand the issue, you can check the logs for more detailed error messages. In the meantime, you can refer to the [Airbyte documentation on basic normalization](https://docs.airbyte.com/understanding-airbyte/basic-normalization) for more information on how normalization works in Airbyte.