Can confirm what @iooj found. It appears for me as well. Using serverless DLT version dlt:16.1.8-delta-pipelines-photon-dlt-release-dp-2025.20-rc0-commit-fcedf0a-image-8aadc5c . This did work on non-serverless for an older version of DLT. Perhaps Databricks has another way? I'll post here if I find something from support.