Mistakes to Avoid in n8n
From the n8n cheat sheet · Common Gotchas · verified Jul 2026
Mistakes to Avoid
Common pitfalls and how to fix them
bash
# Edit Fields Overwrites Data
❌ Problem: All input fields disappear
✅ Fix: Enable "Include Other Input Fields"
# Code Node Return Format
❌ Wrong: return { result: 'success' }
✅ Right: return { json: { result: 'success' } }
# Merge Executes Both IF Paths
❌ Problem: Both true and false paths run
✅ Understand: Merge triggers all waiting inputs
# Static Data Not Persisting
❌ Problem: Data lost between runs
✅ Note: Only saves in PRODUCTION executions!⚠️ Code node MUST return { json: {...} } format
💡 Static data only persists in production runs!
📌 Merge node triggers ALL input branches to execute
🔐 Always enable webhook authentication in production