Shopware 6 Migration: 10 Technical Issues That Can Break Your Store

Migrating an ecommerce store to Shopware 6 can improve performance, flexibility and scalability.

But migration is not simply a matter of moving products and customers to a new platform.

A Shopware 6 migration can affect your database, URLs, integrations, plugins, checkout and SEO. A small technical mistake can lead to missing data, broken pages or lost orders.

The good news is that most migration problems can be avoided with proper planning and testing.

In this guide, we cover 10 technical issues that can cause problems during a Shopware 6 migration and explain how to prevent them.

1. Incomplete Product and Customer Data Migration

Product data is one of the most important parts of an ecommerce migration.

A migration can involve much more than product names and prices. Your store may also contain:

• Product variants
• Categories
• Properties
• Manufacturers
• Product images
• Customer accounts
• Customer groups
• Addresses
• Orders
• Promotions
• Custom fields

If the migration script does not map these fields correctly, important information may be lost or incorrectly imported.

For example, a product may migrate successfully but lose its variants or category assignment.

How to prevent it

Create a complete data mapping document before migration.

Define:

Source field → Shopware 6 field → Transformation rule

Run a test migration first. Compare the source and Shopware 6 data before performing the final migration.

Do not treat a successful import as proof that the data is correct.

2. Broken URLs and Lost SEO Value

URL changes are one of the biggest risks during ecommerce migration.

Your existing store may have hundreds or thousands of indexed URLs.

If these URLs change without proper redirects, users can land on 404 pages. Search engines can also lose the connection between old and new URLs.

This can affect organic visibility and traffic.

How to prevent it

Create a URL mapping before migration.

For example:

Old URL → New URL → Redirect status

Use permanent redirects when an old URL has a direct replacement.

Also check:

• Product URLs
• Category URLs
• CMS pages
• Blog URLs
• Filter URLs
• Image URLs
• Canonical URLs

After launch, monitor Google Search Console for indexing and crawl issues.

SEO migration should be treated as a technical migration task, not something to fix after launch.

3. Plugin and Extension Compatibility Problems

Your existing ecommerce platform may depend on several plugins or extensions.

Not every extension will have an equivalent implementation in Shopware 6.

Even when an extension exists, its functionality may work differently.

This can become a problem when extensions control important processes such as:

• Checkout
• Payments
• Shipping
• Pricing
• Product management
• Customer accounts
• Search
• Marketing automation

Installing extensions without testing them together can create unexpected conflicts.

How to prevent it

Create an extension inventory before migration.

For every existing plugin, decide whether you should:

1. Replace it with a Shopware 6 extension.
2. Rebuild the functionality.
3. Remove the functionality.
4. Integrate an external service.

Test critical extensions together in a staging environment before launch.

4. Incorrect Variant and Product Structure

Shopware 6 uses a structured approach to products, properties and variants.

During migration, legacy product structures may not map directly to the new structure.

This can create issues with:

• Variant combinations
• Stock levels
• Product numbers
• Images
• Prices
• Properties
• Availability

A store may look correct at first glance while individual variants contain incorrect information.

How to prevent it

Test products with different levels of complexity.

Do not test only a simple product.

Include:

• Simple products
• Products with variants
• Products with many variants
• Products with multiple prices
• Products with custom fields
• Products with different stock levels

Then verify the frontend and administration data separately.

5. API and Third-Party Integration Failures

Modern ecommerce stores rarely operate alone.

They often connect with:

• ERP systems
• CRM platforms
• Payment providers
• Shipping systems
• Marketplaces
• Accounting software
• Marketing platforms
• Warehouse systems

A migration can change APIs, authentication methods, data structures or event flows.

As a result, an integration may appear connected but fail when real transactions begin.

How to prevent it

Document every external integration before migration.

For each integration, record:

• What data is transferred?
• Which system sends it?
• Which system receives it?
• How often does synchronisation run?
• What happens when an API request fails?
• How are duplicate records handled?
• How are failed requests retried?

Test real business scenarios rather than checking only whether the API connection works.

For example, test:

Customer created → ERP receives customer

Order placed → ERP receives order

Stock changed → Shopware receives updated stock

This helps identify failures before customers encounter them.

6. Payment and Checkout Problems

Checkout problems can immediately affect revenue.

A migrated store may have a working frontend but still fail during payment processing.

Possible problems include:

• Incorrect payment configuration
• Failed callbacks
• Incorrect order status
• Missing transaction information
• Shipping calculation errors
• Tax calculation problems
• Payment method availability issues

These problems are particularly dangerous because they may not appear during basic website testing.

How to prevent it

Test the complete checkout process.

Create test orders using every important payment method.

Verify the complete flow:

Cart → Checkout → Payment → Order creation → Payment confirmation → Order status

Also test failed payments and cancelled transactions.

A checkout test should not end after the payment page loads.

7. Incorrect Tax, Currency and Sales Channel Configuration

Shopware 6 stores can operate with different sales channels and regional configurations.

Migration problems can occur when tax rules, currencies or sales channel settings are not mapped correctly.

For example, a product may display the expected price but calculate the wrong tax at checkout.

How to prevent it

Review:

• Tax rules
• Tax rates
• Customer groups
• Currencies
• Countries
• Languages
• Sales channels
• Shipping methods
• Payment methods

Test orders from every important market.

Do not assume that one successful checkout confirms the entire configuration.

8. Caching and Performance Problems

A new Shopware 6 installation may perform well in staging but behave differently under production traffic.

Migration can also introduce:

• Large databases
• Inefficient queries
• Heavy extensions
• Incorrect cache configuration
• Slow API requests
• Large media libraries

Performance problems can become visible only after launch.

How to prevent it

Measure performance before and after migration.

Check:

• Server response time
• Database performance
• Page load time
• Checkout performance
• API response time
• Image sizes
• Cache behaviour

Test important pages such as:

• Homepage
• Category pages
• Product pages
• Search
• Cart
• Checkout

Performance should be tested with realistic data volumes.

9. Search, Filters and Navigation Issues

Product search and navigation are essential for large ecommerce stores.

A migration can change how products, properties and categories are indexed.

This can result in:

• Missing products in search
• Incorrect filters
• Empty category pages
• Incorrect product counts
• Broken navigation
• Poor search relevance

These issues can be difficult to notice if you only test a few products.

How to prevent it

Create a search and navigation test list.

Test common customer searches and important product attributes.

Check whether:

• Products appear for relevant searches.
• Filters return the correct products.
• Categories contain the expected products.
• Navigation works on mobile.
• Search results remain useful with spelling variations.

For large catalogues, automated testing can save significant time.

10. Going Live Without a Proper Rollback Plan

One of the biggest migration mistakes is treating launch as the final step.

If something goes wrong after launch, your team needs a clear recovery plan.

Without one, even a small problem can result in extended downtime.

How to prevent it

Before launch, define:

• Final backup process
• Database backup
• File backup
• DNS plan
• Deployment process
• Rollback process
• Responsible team members
• Emergency contacts
• Monitoring process

Also define a clear go/no-go checklist.

Do not launch simply because the new store “looks ready.”

A Practical Shopware 6 Migration Checklist

Before launching your migrated store, verify the following.

Data

• Products migrated correctly
• Variants tested
• Customers migrated
• Orders migrated
• Categories mapped
• Images imported
• Prices checked
• Stock levels checked

SEO

• URLs mapped
• Redirects tested
• Canonicals checked
• XML sitemap checked
• Robots.txt checked
• Metadata reviewed
• Internal links checked
• Search Console monitoring prepared

Ecommerce

• Checkout tested
• Payment methods tested
• Shipping methods tested
• Taxes checked
• Coupons tested
• Customer accounts tested
• Order emails tested

Integrations

• ERP tested
• CRM tested
• Payment APIs tested
• Shipping integrations tested
• Marketplace integrations tested
• Webhooks tested
• Error handling tested

Performance

• Cache configured
• Images optimised
• Database checked
• API performance tested
• Important pages tested
• Mobile experience checked

Launch

• Production backup completed
• DNS plan confirmed
• Rollback plan ready
• Monitoring active
• Team responsibilities confirmed

Final Thoughts

A Shopware 6 migration is both a technical and business project.

Moving the database is only one part of the process.

The real challenge is making sure the new store continues to handle products, customers, orders, payments, integrations and SEO correctly.

The safest approach is to plan the migration in stages:

Audit → Mapping → Test Migration → Development → Testing → SEO Validation → User Acceptance Testing → Launch → Monitoring

Most migration problems become much easier to solve when they are discovered before launch.

If your store has a complex catalogue, multiple integrations or significant organic traffic, invest extra time in testing.

A successful Shopware 6 migration should not simply move your store.

It should give you a stable foundation for future growth.