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Fix BigCommerce → Klaviyo Sync Issues (Not Working, Errors, Duplicates)

🔧 1 Common Issues

Diagnose and resolve common sync problems. We've documented the 1 most common issues, their root causes, and exactly how to fix them. See step-by-step fixes for duplicates, missing fields, rate limit errors, and connection issues.

high Moderate Frequency

Welcome email sends immediately, but the dynamic BigCommerce coupon code hasn't generated yet.

Also searched as: "BigCommerce Klaviyo welcome email sends immediately, but the dynamic bigcommerce coupon code hasn't generated yet."

#1 Async API Latency 80% likely

📋 How to Diagnose

  1. 1. Are you using a flow that triggers on 'Subscriber Created'?
  2. 2. Does it request a code from BigCommerce?
  3. 3. If the BC API is slow, Klaviyo sends the email with a blank or fallback code.

✓ Solution

Add a 'Wait' step in Klaviyo or pre-generate a pool of coupons in BigCommerce to avoid real-time generation lag.

⏱️ Est. time: 10 min

View Setup Guide

Step 1: Try the Official Integration

Direct connection

Start with the native integration if available. It's usually the most reliable, but may have limitations.

View Setup Guide

Free with your subscription

Step 2: Use Make for Custom Flows

No code automation

Create custom integration workflows with Make's visual designer. It works with almost any API.

Try Make Free →

1000 ops/mo free. No credit card.

Step 3: Self-Hosted with n8n

Full data control

Need complete data privacy? n8n is open-source and self-hostable. Build custom integrations with full control over your data.

Try n8n Free →

Open source. Self-host or cloud. Unlimited ops.

Step 4: Add Human Review

Approval automation

Relay adds human-in-the-loop approvals, Slack/Teams alerts, and conditional logic to your automation.

Try Relay Free →

1000 actions/mo free. No credit card.