> 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.

# 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](https://mfeflow.github.io/mfeflow/guide/deploy-and-rollback).