remotion-dev/remotion · error · Error

Expected sequence prop update result

Error message

Expected sequence prop update result

What it means

updateSequenceProps runs a codemod over a file to update Sequence element props and expects the codemod engine to return exactly one result for the single change set it passes ({nodePath, updates, schema, videoConfigValues}). If results[0] is falsy, the codemod engine produced no result despite being given a valid change set, which the library treats as an internal invariant violation rather than a user error.

Solutions

1. Reload/refresh the Studio so the cached videoConfig and file contents are back in sync
2. Undo external edits to the composition file so the target node matches what Studio expects
3. Retry the prop update; if it persists, report the bug with the source file snippet

try {
  await updateSequenceProps({...});
} catch (e) {
  if (e.message === 'Expected sequence prop update result') {
    // refresh Studio state and retry once, else surface as bug
  }
}

When it happens

Trigger: Calling updateSequenceProps (e.g. from Studio's visual editing / update-sequence-props flow) where the underlying apply-codemod call returns an empty results array for the single change it submitted — typically because the file did not match the codemod's expected AST structure at the given nodePath.

Common situations: Editing a Sequence's props through the Studio UI when the source file has been edited externally (AST no longer matches the cached videoConfig snapshot), or when the file uses unusual formatting/constructs the codemod cannot parse into the expected node.

Understand the failure class

Background: "This is a bug, please report it": internal invariant violations, unreachable panics, and SNH errors explained — this error's family across 47 libraries.

Related errors

• Could not find as a reorder target
• Could not serialize the visual control value
• New composition ID does not match installation target
• New composition source does not match installation target
• No changes were made to the file

AI-assisted analysis of remotion-dev/remotion@46a3a6bf13 (2026-09-18). Data as JSON: /api/errors/9123ac1b137bf7dd. Report an issue: GitHub.

Appendix: source

Thrown at packages/studio-server/src/codemods/update-sequence-props/update-sequence-props.ts:86

	schema,
	prettierConfigOverride,
	videoConfigValues,
}: {
	input: string;
	nodePath: SequenceNodePath;
	updates: SequencePropUpdate[];
	schema: InteractivitySchema;
	prettierConfigOverride: PrettierConfigOverride;
	videoConfigValues: VideoConfigValues | null;
}): Promise<UpdateSequencePropsResult> => {
	const {output, results} = await updateMultipleSequenceProps({
		input,
		changes: [{nodePath, updates, schema, videoConfigValues}],
		prettierConfigOverride,
	});
	const result = results[0];
	if (!result) {
		throw new Error('Expected sequence prop update result');
	}

	return {
		output,
		oldValueStrings: result.oldValueStrings,
		formatted: true,
		logLine: result.logLine,
		removedProps: result.removedProps,
	};
};

View on GitHub (pinned to 46a3a6bf13)