windmill-labs/windmill · error

A pipeline node already exists at '${path}'. Use edit_pipeli

Error message

A pipeline node already exists at '${path}'. Use edit_pipeline_node to change it instead.

What it means

pipelineAiHelpers proposeNode rejects creating a node where the resolved pipeline graph already has a node (deployed pipeline runnable) at that path; building new would shadow it as a draft, so the model must use edit_pipeline_node.

Source

Thrown at frontend/src/lib/components/assets/AssetGraph/pipelineAiHelpers.ts:245

				return undefined
			}
		},
		proposeNode: async ({ path, language, content, outputKind }) => {
			deps.ensureEditable?.()
			// build_pipeline_node creates a NEW node in the OPEN folder. Reject a path
			// outside the folder (it would silently stage into this folder's bundle)
			// and a path that collides with an existing node (the model should use
			// edit_pipeline_node instead of shadowing a deployed node as a draft).
			assertInFolder(path)
			assertPipelineAnnotation(content)
			const drafts = deps.getDrafts()
			if (drafts.has(path)) {
				throw new Error(
					`A draft already exists at '${path}'. Use edit_pipeline_node to change it instead.`
				)
			}
			if (deps.getResolvedGraph().runnables.some((r) => r.path === path)) {
				throw new Error(
					`A pipeline node already exists at '${path}'. Use edit_pipeline_node to change it instead.`
				)
			}
			// Authoritative new-node check: the resolved graph may not have hydrated yet
			// (the session preview can race open_preview), and it only lists pipeline
			// runnables — so probe the backend. ANY deployed script at this path means
			// "build new" would shadow it on deploy; the model should edit instead.
			const workspace = deps.getWorkspace()
			if (workspace) {
				let deployedExists = false
				try {
					await ScriptService.getScriptByPath({ workspace, path })
					deployedExists = true
				} catch {
					// 404 → no deployed script at this path, safe to create a new node.
				}
				if (deployedExists) {
					throw new Error(

View on GitHub (pinned to e474e8803c)

Solutions

1. Use edit_pipeline_node to change the existing pipeline node.
2. Choose a fresh path for a new node.

When it happens

Trigger: Thrown at frontend/src/lib/components/assets/AssetGraph/pipelineAiHelpers.ts:245 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of windmill-labs/windmill@e474e8803c (2026-09-03). Data as JSON: /api/errors/42be7824ae50395c. Report an issue: GitHub.