chatboxai/chatbox · error

Duplicate session id in manifest: ${session.id}

Error message

Duplicate session id in manifest: ${session.id}

What it means

Thrown by validateBackupManifestGraph while scanning manifest.sessions. Each session entry must carry a unique id; when a second session with an already-seen id is found, validation aborts. This protects the restore path, which keys session storage by id.

Source

Thrown at src/renderer/packages/backup/types.ts:98

  }),
  sessions: z.array(BackupSessionEntrySchema).max(50_000),
  resources: z.array(BackupResourceEntrySchema).max(50_000),
  warnings: z.array(BackupWarningSchema).max(50_000),
  stats: z.object({
    sessionCount: z.number().int().nonnegative(),
    resourceCount: z.number().int().nonnegative(),
    deduplicatedResourceCount: z.number().int().nonnegative(),
    warningCount: z.number().int().nonnegative(),
  }),
})
export type BackupManifest = z.infer<typeof BackupManifestSchema>

export function validateBackupManifestGraph(manifest: BackupManifest): void {
  const resourceIds = new Set<string>()
  const resourceKeys = new Set<string>()
  const sessionIds = new Set<string>()
  for (const session of manifest.sessions) {
    if (sessionIds.has(session.id)) throw new Error(`Duplicate session id in manifest: ${session.id}`)
    sessionIds.add(session.id)
    if (session.meta.id !== session.id) throw new Error(`Session metadata id does not match: ${session.id}`)
  }
  for (const resource of manifest.resources) {
    if (resourceIds.has(resource.id)) throw new Error(`Duplicate resource id in manifest: ${resource.id}`)
    resourceIds.add(resource.id)
    const ownResourceKeys = new Set<string>()
    for (const key of resource.originalStorageKeys) {
      if (ownResourceKeys.has(key)) throw new Error(`Resource contains a duplicate storage key: ${resource.id}`)
      ownResourceKeys.add(key)
      if (resourceKeys.has(key)) throw new Error(`Duplicate resource storage key in manifest: ${key}`)
      resourceKeys.add(key)
    }
    const ownSessionIds = new Set<string>()
    for (const sessionId of resource.sessionIds) {
      if (ownSessionIds.has(sessionId)) throw new Error(`Resource contains a duplicate session id: ${resource.id}`)
      ownSessionIds.add(sessionId)
      if (!sessionIds.has(sessionId)) throw new Error(`Resource references an unknown session: ${sessionId}`)

View on GitHub (pinned to 81571269ad)

Solutions

1. Inspect manifest.sessions and remove or rename the duplicate id entry.
2. Re-export from the source so the exporter dedupes by id.
3. When merging backups, dedupe sessions by id before packing the manifest.

Example fix

// before
validateBackupManifestGraph(manifest)

// after
const seen = new Set<string>()
manifest.sessions = manifest.sessions.filter((s) =>
  seen.has(s.id) ? false : (seen.add(s.id), true)
)
validateBackupManifestGraph(manifest)

function findDuplicateSessionIds(manifest: BackupManifest): string[] {
  const seen = new Set<string>()
  const dups = new Set<string>()
  for (const s of manifest.sessions) (seen.has(s.id) ? dups : seen).add(s.id)
  return [...dups]
}

try {
  validateBackupManifestGraph(manifest)
} catch (error) {
  if (/Duplicate session id/.test((error as Error).message)) reportCorruptBackup(error)
  throw error
}

When it happens

Trigger: Two entries in manifest.sessions share the same session.id. Produced by a hand-edited manifest, a merge of two exports, or an exporter that failed to dedupe by id.

Common situations: Merging two backup files; exporting a session list with a duplicated row; a sync collision that wrote the same session id twice.

Related errors

• Duplicate resource id in manifest: ${resource.id}
• Resource contains a duplicate storage key: ${resource.id}
• Duplicate resource storage key in manifest: ${key}
• Resource contains a duplicate session id: ${resource.id}
• Session contains a duplicate resource id: ${session.id}

AI-assisted analysis of chatboxai/chatbox@81571269ad (2026-08-12). Data as JSON: /api/errors/260e5cca35247b9a. Report an issue: GitHub.