> For the complete documentation index, see [llms.txt](https://docs.sylius-cms.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.sylius-cms.com/upgrade/to-0.6.md).

# Upgrade to v0.6

First run `php bin/console doctrine:migrations:diff` to get a fresh migration file. Now search for `code VARCHAR(255) NOT NULL` within that file. Immediately after that line add the following line:

```
$this->addSql("UPDATE setono_sylius_cms__asset SET code=SUBSTR(REPLACE(path, '/', ''), 1, 32)");
```

This will make sure the newly added `code` field will be unique.