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n8n MongoDB authentication failed – fix for SCRAM and connection string auth

March 28, 2026
n8n MongoDB errors

n8n MongoDB Replica Set Connection Error

February 6, 2026
n8n MongoDB errors

n8n cannot authenticate to MongoDB

February 6, 2026
n8n MongoDB errors

n8n MongoDB connection timeout – fix for replica set and connection string errors

March 28, 2026
n8n MongoDB errors

n8n MongoDB Invalid Connection String Error

February 6, 2026
n8n MongoDB errors

n8n PostgreSQL node upsert not updating rows – on conflict fix

March 28, 2026
n8n PostgreSQL Errors

n8n PostgreSQL Connection Not Working – ECONNREFUSED, SSL & Docker Fix

April 2, 2026
n8n PostgreSQL Errors

n8n PostgreSQL node not updating – query parameters $1 $2 fix

March 28, 2026
n8n PostgreSQL Errors
← Previous 1 … 37 38 39 Next →

Categories

  • Docker Debugging (3)
  • n8n API Integration Errors (17)
  • n8n Architectural & Decision-Making (16)
  • n8n Architectural Failure Modes (13)
  • n8n Architecture & Execution Foundations (19)
  • n8n Authentication Errors (16)
  • n8n Automations (2)
  • n8n Cost & Infrastructure Economics (15)
  • n8n Degradation & Stability Issues (12)
  • n8n Installation & Setup Errors (16)
  • n8n MongoDB errors (12)
  • n8n Node-Specific Errors (25)
  • n8n Performance & Scaling (26)
  • n8n PostgreSQL Errors (4)
  • n8n Production Failure Patterns (11)
  • n8n Production Readiness & Scalability Risks (12)
  • n8n Queue Mode Errors (26)
  • n8n Redis errors (15)
  • n8n Security Errors (12)
  • n8n SQLite errors (13)
  • n8n vs Zapier (5)
  • n8n Webhook Errors (17)
  • Uncategorized (1)

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Table of Contents

Toggle
    • Why Your n8n PostgreSQL Node Executes Without Writing Data?
        • Common Causes at a Glance:
  • How to Debug Update Failures in n8n?
      • Step 1: Validate With SELECT Inside Workflow
      • Step 2: Inspect Node Output
      • Step 3: Check Workflow Logic
    • Provider-Specific Gotchas:
    • Quick Validation Checklist:
    • Advanced Debugging Tips:
  • Related Guides:
    • Final Takeaway:

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