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E-Commerce Data Quality

How to Merge Product Catalogs After an E-Commerce Platform Migration

Platform migrations create catalog chaos: duplicate products, missing images, broken variants. Here's how to merge and clean your product catalog during a platform move.

Key Takeaways
  • Clean the source catalog before migrating — cleaning in the destination is 10x harder
  • Create a migration mapping document before touching the destination platform
  • Post-migration: compare row counts between source export and destination import to find dropped products
  • Spot-check images for 50 products — image URLs frequently break during migrations
  • Every changed product URL needs a 301 redirect verified before going live

The Migration Data Disaster That Doesn't Have to Happen

Platform migrations are among the highest-risk data events in e-commerce. Products get duplicated. Variants get separated from their parents. Images break. Categories get miscategorized. SEO-critical slugs change and redirect rules are incomplete.

The good news: most migration data disasters are preventable with a structured approach to catalog cleanup before and after the move.

Pre-Migration: Clean the Source Data First

Don't migrate a dirty catalog. Cleaning is 10x harder in the destination platform than in the source.

Before you migrate:

  1. Remove all draft and inactive products that shouldn't be migrated
  2. Standardize category names and product types
  3. Ensure every product has all required fields: title, description, at least one image, price, SKU
  4. Fix duplicate SKUs (they'll cause import errors in most destination platforms)
  5. Export the cleaned catalog and keep it as your migration source of truth

Sohovi automatically finds every duplicate in your dataset — including near-matches — and shows you exactly which rows are affected.

The Migration Mapping Document

Before you touch the destination platform, create a migration mapping document:

| Source Platform | Destination Platform | Notes | |---|---|---| | Product Type | Collection | Map each type to the correct collection | | Vendor | Brand | Verify brand names are consistent | | Tags | Tags | Tag taxonomy may change | | Metafields | Custom fields | Check if destination supports the same metafields |

This document is your migration spec. Anyone involved in the migration refers to it.

Post-Migration Audit

After the migration is complete, run a reconciliation audit:

Sohovi validates your dataset before it enters the warehouse — catching format errors, nulls, and duplicates at the source.

1. Row count check: Source platform exported N products. Destination platform imported M products. If M < N, something was dropped. Investigate before going live.

2. Image verification: Spot-check 50 products — do all images load? Images frequently break during migrations because they're referenced by URL rather than uploaded.

3. Variant completeness: For 20 products with variants, verify all variants migrated and are linked correctly to the parent.

Sohovi profiles every column in your dataset for completeness and flags the exact rows where values are missing — free to try.

4. Price accuracy: Spot-check 30 prices against your source platform. Price import errors are common and financially consequential.

5. URL and redirect verification: For every product URL that changed, verify the redirect is in place and returns HTTP 301. Broken redirects destroy SEO equity you've built over years.

After Going Live

Monitor for 30 days:

  • 404 error rates (broken product URLs you missed)
  • Search ranking changes (sudden drops indicate redirect or canonical issues)
  • Customer service contacts mentioning "product not found" or "can't find what I'm looking for"

Plan for a 30-day stabilization period. Migrations rarely go perfectly — having a monitoring plan ensures you catch and fix issues before they compound.

Frequently Asked Questions

How long does a product catalog migration take?

For a catalog under 500 products, 1–3 days for the migration itself plus 1 week for cleanup. For 5,000+ products, plan for 2–4 weeks including pre-migration cleaning and post-migration audit.

What's the most common data loss in e-commerce migrations?

Metafield data and product-level custom attributes. Most platform migration tools handle standard fields well but miss custom attributes. Audit these specifically in your post-migration check.

Do I need to re-verify SEO settings after migration?

Yes. Check: canonical URL tags, product schema markup, meta titles and descriptions, hreflang tags if you're international. These are often not handled by migration tools and must be set up manually in the destination platform.

Selva Santosh

Data quality, for people who ship

Selva writes practical guides on data quality, profiling, and governance to help teams ship better data.

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