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I'm working with an Azure Function App that contains multiple functions. By mistake, I deployed a new function with a name that already existed in the project. After fixing this, the Azure Portal failed to update the function list, and every deployment attempt failed at the Kudu-SyncTriggerStep with an error.I tried the following to resolve the issue, but none worked: Manually triggering synchronization in the Azure Portal. Running the sync command via the Azure CLI. Deleting the deployment files in the associated storage account. Publishing a new project with a single function to overwrite the existing configuration.

In the end, I had to recreate the Azure Function App resource and redeploy with a corrected function name. Has anyone encountered this issue before? Is there a better way to resolve this without recreating the entire resource?

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Yes, this happens sometimes with Azure Functions. When two functions with the same name exist, the metadata in the storage account and the function app’s host.json/config get messed up. Once that happens, the portal and Kudu struggle to reconcile the function list, which is why deployments and sync triggers start failing.

Unfortunately, there isn’t always a clean “one-click” fix. The usual tricks—manual sync, CLI sync, clearing deployment files, or redeploying a smaller project—often don’t work because the corrupted metadata doesn’t get fully reset. That’s why recreating the Function App worked for you: it gave you a fresh state.

A couple of slightly less destructive things you could try next time before recreating the whole app:

  • Delete the broken function explicitly: Remove the function folder from wwwroot (via Kudu or FTP) and check that it’s gone from the storage account under AzureWebJobsStorage.

  • Stop → Deploy → Start: Sometimes stopping the Function App before deploying the corrected version lets it reset properly.

  • Use slots: If you deploy into a staging slot, you can blow away and redeploy that slot without affecting production, then swap once it’s good.

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