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Magento 2 Migration: Common Issues and How to Fix Them

Migrating from Magento 1 to Magento 2 significantly improves performance and security as well as adds more features. However, the migration can be complicated, and one may face several issues during the process. This guide explains the most common problems and how to fix them.

1. Performance and Speed Issues

One of the most common issues is that often, after migration, a website may become slow due to some incorrect settings or outdated system configurations.

Why does this happen?

  • Magento 2’ system requirements differ from those of Magento 1.
  • Large amounts of data can slow down the website.
  • Poorly optimized code or media files can cause certain delays.

Solutions:

It is recommended to:

a) Use a Content Delivery Network (CDN) to load images and scripts faster.

To set up a CDN in Magento:

  • Log in to your Magento admin panel.
  • Go to Stores > Settings > Configuration.
  • Under General Settings, click Web.
  • Find the Base URL section and enter your CDN links in:
    • Base URL for Static View Files
    • Base URL for User Media Files
  • Get these CDN links from a trusted CDN provider to improve your website speed.
Magento Web Section Base URLs part
  • Do the same in the Base URLs (Secure) section.
  • Click Save Config at the top to apply the change
Magento Web Section Base URLs (Secure) part

b) Minimize JavaScript and CSS files to speed up the load times of pages. To do that, you can turn off JavaScript bundling and improve how CSS loads:

  • Check JavaScript Bundling:
    • Go to Stores > Settings > Configuration > Advanced > Developer > JavaScript Settings.
    • Make sure Merge JavaScript Files and Enable JavaScript Bundling are set to No (In Magento 2, that is disabled by default).
Magento Developer Section Javascript Settings

  • Improve CSS Delivery:
    • Go to Stores > Settings > Configuration > Advanced > Developer > CSS Settings to adjust CSS loading settings.
Magento Developer Section CSS Settings

c) Run the migration process during low-traffic hours only to reduce server strain.

d) Upgrade your hosting plan if needed.

2. Data Migration Errors

Another important issue to consider is that one might lose some data or end up with corrupted files if the migration is not performed correctly.

Why does this happen?

  • Data structures in Magento 1 differ from those in Magento 2.
  • Some fields from Magento 1 may not even exist in Magento 2.
  • Migration tools might fail if the data is not properly cleaned up.

Solutions:

It is recommended to: 

  • Take several backups before starting the migration.
  • Use the official Magento Data Migration Tool to transfer data in a more organized way.
  • Check for missing or incorrect data after the migration.
  • Instead of moving everything at once, migrate in smaller batches. 

3. Theme Compatibility Issues

Some Magento 1 themes do not work properly on Magento 2, so your store design may break.

Why does this happen?

  • Magento 2 has a different architecture for themes and templates.
  • Styles and layouts in Magento 1 are not always directly transferable.

Solutions:

  • Rebuild the theme from scratch or use a Magento 2 default theme.
  • Change the template and CSS files to match Magento 2’s framework.
  • Purchase a pre-built Magento 2 theme if you want a quicker solution.

4. Extension Compatibility Problems

Some Magento 1 extensions do not always have Magento 2 versions, which can lead to missing functionality.

Why does this happen?

  • Magento 2 uses a different architecture for extensions.
  • Some developers do not offer Magento 2 versions of their extensions.

Solutions:

  • Check if your Magento 1 extensions have versions for Magento 2.
  • If not all, then search for alternatives in the Magento Marketplace.
  • Hire a developer to build custom solutions if required.

At the same time, Magento 2 comes with more built-in features than Magento 1. This means you may not need some of the extensions you used before, which is great because fewer extensions can help your store run faster and perform better. 

5. SEO Challenges

One more aspect worth attention while migrating from Magento 1 to Magento 2 is that your search rankings may drop after migration but only if SEO settings are not properly maintained.

Why does this happen?

  • URLs might change, leading to broken links.
  • Search engines may take time to recognize the new structure of a website.
  • Metadata and SEO settings may not transfer correctly.

Solutions:

  • Use canonical URLs to prevent duplicate content.
  • Keep the same URL structure as Magento 1 whenever possible.
  • Set up 301 redirects for old URLs that have changed.
  • Optimize Magento 2’s SEO settings, including metadata and sitemaps.

6. Security Issues

Overall, Magento 2 offers better security. Still, as usual, if security settings are not correctly configured, your store could be at risk of cyberattacks.

Why does this happen?

  • Default security settings may not be strong enough.
  • Sensitive data might not be properly encrypted.
  • Hackers look for vulnerabilities in new installations.

Solutions:

  • Encrypt data during the transfer process.
  • Apply the latest security patches to Magento 2.
  • Enable Two-Factor Authentication (2FA) for admin accounts.
  • Set strict file and directory permissions to limit access.

7. Slow Queries and Database Bottlenecks

Another challenge is that your store might experience slowdowns due to inefficient database queries.

Why does this happen?

  • Magento 2 has a different database structure than in Magento 1, which may not work well with old queries.
  • Large amounts of unnecessary data can slow things down.

Solutions:

  • Optimize your database by cleaning up unnecessary data.
  • Use profiling tools to find and fix slow queries.
  • Only migrate the data that is necessary to improve performance.

8. Custom Code Migration Issues

Unfortunately, some custom scripts or custom features you had in Magento 1 may not work in Magento 2.

Why does this happen?

  • Magento 2 has different standards of coding and frameworks.
  • Custom scripts may not be fully compatible with the new platform.

Solutions:

  • Rewrite custom code in order to follow Magento 2’s standards.
  • Test all custom scripts thoroughly before going live.
  • Keep a detailed record of changes for future troubleshooting.

Final Thoughts: Ensuring a Smooth Migration

Migrating from Magento 1 to Magento 2 is a big task, but with proper planning and keeping in mind the above-listed potential issues and their solutions, you can avoid most problems.

Things to remember include:

  • It is crucial to back up all data before starting the migration. 
  • It is also highly recommended to clean and validate data before migration.
  • Another important step is to optimize scripts and databases for efficiency.
  • One more recommendation is to test everything before launching your new Magento 2 site.
  • If needed, get help from Magento experts.

By following these best practices, you can prevent data loss, minimize downtime, and ensure your Magento 2 store runs smoothly.

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