mastra-ai/mastra · error · HTTPException

Version with id ${from} not found

Error message

Version with id ${from} not found

What it means

Thrown by the revert/compare handler when getVersion(from) returns null: the 'from' version id supplied in the request does not exist. 404 HTTPException; scope checks on the block have already passed, so only the version id is wrong.

Source

Thrown at packages/server/src/server/handlers/prompt-block-versions.ts:460

  tags: ['Prompt Block Versions'],
  handler: async ({ mastra, promptBlockId, from, to, requestContext }) => {
    try {
      const storage = mastra.getStorage();

      if (!storage) {
        throw new HTTPException(500, { message: 'Storage is not configured' });
      }

      const promptBlockStore = await storage.getStore('promptBlocks');
      if (!promptBlockStore) {
        throw new HTTPException(500, { message: 'Prompt blocks storage domain is not available' });
      }
      const promptBlock = await promptBlockStore.getById(promptBlockId);
      assertStoredResourceScope(promptBlock, await getStoredResourceScope(mastra, requestContext));

      const fromVersion = await promptBlockStore.getVersion(from);
      if (!fromVersion) {
        throw new HTTPException(404, { message: `Version with id ${from} not found` });
      }
      if (fromVersion.blockId !== promptBlockId) {
        throw new HTTPException(404, {
          message: `Version with id ${from} not found for prompt block ${promptBlockId}`,
        });
      }

      const toVersion = await promptBlockStore.getVersion(to);
      if (!toVersion) {
        throw new HTTPException(404, { message: `Version with id ${to} not found` });
      }
      if (toVersion.blockId !== promptBlockId) {
        throw new HTTPException(404, {
          message: `Version with id ${to} not found for prompt block ${promptBlockId}`,
        });
      }

      const fromConfig = extractConfigFromVersion(

View on GitHub (pinned to 75dd419e61)

Solutions

1. Re-fetch the block's version list and use an existing versionId as 'from'.
2. Check the version wasn't deleted by the delete-version route or cleanup jobs.
3. Confirm both client and server point at the same storage database.

const versions = await getBlockVersions(promptBlockId);
if (!versions.some(v => v.id === from)) {
  throw new Error(`'from' version ${from} not found on block ${promptBlockId}`);
}

function resolveFrom(versions: { id: string }[], from: string): string | null {
  return versions.some(v => v.id === from) ? from : null;
}

try {
  await revertVersions(promptBlockId, from, to);
} catch (e) {
  if (e.status === 404 && e.message.includes('with id ' + from)) {
    // refetch version list and pick an existing 'from'
  }
  throw e;
}

When it happens

Trigger: Requesting a version diff/revert with a from versionId that was deleted or never existed under this storage.

Common situations: Reverting to an old version that a teammate already pruned, stale UI state listing versions, or ids copied from logs of another environment.

Related errors

• ACP connection is not initialized
• Model "${this.options.model}" is not available. Available mo
• ClaudeSDKAgent resumeData.sessionId must be a string.
• ClaudeSDKAgent resumeData.continue must be true when provide
• Version with id ${to} not found

AI-assisted analysis of mastra-ai/mastra@75dd419e61 (2026-08-30). Data as JSON: /api/errors/328797a4eb8837ca. Report an issue: GitHub.