For AI agents: the complete documentation index is available at https://mfeflow.github.io/mfeflow/llms.txt, the full documentation bundle is available at https://mfeflow.github.io/mfeflow/llms-full.txt, and this page is available as Markdown at https://mfeflow.github.io/mfeflow/errors/E505.md.
mfeflow

    MFEFLOW_E505

    A rollout was asked for, and a static host cannot split traffic.

    Fix

    Deploy to one version at a time, or use the registry server for percentage rollouts. See https://mfeflow.github.io/mfeflow/guide/deploy-and-rollback.