Celery Duplicate param 'uid' in CeleryDaemonCommand (Fix)

The Fix

pip install celery==5.2.4

Based on closed celery/celery issue #7245 · PR/commit linked

Production note: This usually shows up under retries/timeouts. Treat it as a side-effect risk until you can verify behavior with a canary + real traffic.

Open PR/Commit

@@ -179,7 +179,6 @@ def __init__(self, *args, **kwargs):
         self.params.append(CeleryOption(('--pidfile',), help_group="Daemonization Options"))
         self.params.append(CeleryOption(('--uid',), help_group="Daemonization Options"))
-        self.params.append(CeleryOption(('--uid',), help_group="Daemonization Options"))
         self.params.append(CeleryOption(('--gid',), help_group="Daemonization Options"))
         self.params.append(CeleryOption(('--umask',), help_group="Daemonization Options"))

fix.md

Option A — Upgrade to fixed release\npip install celery==5.2.4\nWhen NOT to use: This fix should not be applied if the duplication is intentional for some reason.\n\n

Why This Fix Works in Production

Trigger: Duplicate param 'uid' in CeleryDaemonCommand
Mechanism: CeleryDaemonCommand has a duplicated CeleryOption for the --uid parameter
Why the fix works: Removes the duplicated 'uid' parameter in CeleryDaemonCommand, addressing issue #7245. (first fixed release: 5.2.4).

Production impact:

If left unfixed, retries/timeouts can trigger duplicate external side-effects (double charges, duplicate emails, repeated writes).

Why This Breaks in Prod

CeleryDaemonCommand has a duplicated CeleryOption for the --uid parameter
Production symptom (often without a traceback): Duplicate param 'uid' in CeleryDaemonCommand

Proof / Evidence

GitHub issue: #7245
Fix PR: https://github.com/celery/celery/pull/7246
First fixed release: 5.2.4
Reproduced locally: No (not executed)
Last verified: 2026-02-09
Confidence: 0.85
Did this fix it?: Yes (upstream fix exists)
Own content ratio: 0.58

Discussion

High-signal excerpts from the issue thread (symptoms, repros, edge-cases).

Jump to Sources Open on GitHub

“Hey @Smixi :wave:, Thank you for opening an issue”

@open-collective-bot · 2022-01-20 · source

Failure Signature (Search String)

Duplicate param 'uid' in CeleryDaemonCommand
- [ x] I have included all related issues and possible duplicate issues in this issue

Copy-friendly signature

signature.txt

Failure Signature
-----------------
Duplicate param 'uid' in CeleryDaemonCommand
- [ x] I have included all related issues and possible duplicate issues in this issue

Error Message

Signature-only (no traceback captured)

error.txt

Error Message
-------------
Duplicate param 'uid' in CeleryDaemonCommand
- [ x] I have included all related issues and possible duplicate issues in this issue

What Broke

Documentation shows duplicated lines for command options, causing confusion.

Why It Broke

CeleryDaemonCommand has a duplicated CeleryOption for the --uid parameter

Fix Options (Details)

Option A — Upgrade to fixed release Safe default (recommended)

pip install celery==5.2.4

When NOT to use: This fix should not be applied if the duplication is intentional for some reason.

Use when you can deploy the upstream fix. It is usually lower-risk than long-lived workarounds.

Fix reference: https://github.com/celery/celery/pull/7246

First fixed release: 5.2.4

Last verified: 2026-02-09. Validate in your environment.

When NOT to Use This Fix

This fix should not be applied if the duplication is intentional for some reason.

Did This Fix Work in Your Case?

Quick signal helps us prioritize which fixes to verify and improve.

Prevention

Capture the exact failing error string in logs and tests so you can reproduce via a minimal script.
Pin production dependencies and upgrade only with a reproducible test that hits the failing path.

Version Compatibility Table

Version	Status
5.2.4	Fixed

Related Issues

No related fixes found.

Cluster: celery:duplicate-processing Celery hub Celery best practices All hubs All clusters

Related clusters: Configuration error Data consistency Duplicates

Sources

We don’t republish the full GitHub discussion text. Use the links above for context.