> ## Documentation Index
> Fetch the complete documentation index at: https://docs.t3planet.de/en/latest/llms.txt
> Use this file to discover all available pages before exploring further.

# Upgrade Guide

> This product's greater then v3.3.0 is major breaking changes to migrate from outdated EXT.gridelements to modern EXT.container.

## Upgrade Product >= v3.3.0 (Migrate from EXT.gridelements to EXT.container)

This product's greater then v3.3.0 is major breaking changes to migrate from outdated EXT.gridelements to modern EXT.container. Please take a look at the step-by-step migration guide below.

<Steps>
  <Step title="Step 1">
    Go to NITSAN > License Manager > Update to latest version of EXT.ns\_theme\_t3avatar
  </Step>

  <Step title="Step 2">
    Update EXT.ns\_basetheme atleast v11.5.x
  </Step>

  <Step title="Step 3">
    Go to Admin Tools > Maintenance module > Clear cache. Also, click on the "Dump Autoload" button. Or run the below command for the composer-based TYPO3 instance.

    ```python theme={"theme":{"light":"github-light","dark":"github-dark"}}
    composer dump-autoload
    ```
  </Step>

  <Step title="Step 4">
    Install EXT.container extension
  </Step>

  <Step title="Step 5">
    Go to Admin Tools > Upgrade > Click on "Run Upgrade Wizard"
  </Step>

  <Step title="Step 6">
    Click on the "Execute" button of "Grid to Container Migration"

    <img src="https://mintcdn.com/t3planet/NWcnd_VcDjGMa-Ri/en/latest/EXTAvatar/UpgradeGuide/images/typo3_dumpautoload.webp?fit=max&auto=format&n=NWcnd_VcDjGMa-Ri&q=85&s=ca2c1a890b711fa89b6cf55ca1a10705" alt="typo3_dumpautoload" width="1480" height="670" data-path="en/latest/EXTAvatar/UpgradeGuide/images/typo3_dumpautoload.webp" />

    <img src="https://mintcdn.com/t3planet/NWcnd_VcDjGMa-Ri/en/latest/EXTAvatar/UpgradeGuide/images/typo3_upgrade_wizard.webp?fit=max&auto=format&n=NWcnd_VcDjGMa-Ri&q=85&s=8fe42c449decfe44a85de3e0465c74e5" alt="typo3_upgrade_wizard" width="1882" height="694" data-path="en/latest/EXTAvatar/UpgradeGuide/images/typo3_upgrade_wizard.webp" />

    <img src="https://mintcdn.com/t3planet/NWcnd_VcDjGMa-Ri/en/latest/EXTAvatar/UpgradeGuide/images/migrate_gridelement_to_container.webp?fit=max&auto=format&n=NWcnd_VcDjGMa-Ri&q=85&s=1e4002f8bc843ea40d6e09a4b2eb4681" alt="migrate_gridelement_to_container" width="1296" height="833" data-path="en/latest/EXTAvatar/UpgradeGuide/images/migrate_gridelement_to_container.webp" />
  </Step>

  <Step title="Step 7">
    Go to Admin Tools > Extensions > De-activate & Delete EXT.gridelements
  </Step>

  <Step title="Step 8">
    Go to Admin Tools > Maintenance > Clear Cache.

    That's it! All the grids are migrated (structure and data) from EXT.gridelements to EXT.container TYPO3 extension.
  </Step>
</Steps>