> ## 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 For Container
> Upgrade Product ≥ v3.3.0 Migration from Grid Elements to Container
## Upgrade Product ≥ v3.3.0 (Migration from Grid Elements to Container)
From version **3.3.0** onwards, this product introduces major changes by
migrating from the outdated **Grid Elements (EXT)** extension to the modern
**Container (EXT)** extension. Please follow the step-by-step migration
guide below.
1. Go to **NITSAN → License Manager** and update **T3Karma Theme (EXT)**
to the latest version.
2. Update **Base Theme (EXT)** to at least **v11.5.x**.
3. Go to **Admin Tools → Maintenance** module and clear the cache.
Also click the **Dump Autoload** button. For composer-based TYPO3 installations, run the following command:
```bash theme={"theme":{"light":"github-light","dark":"github-dark"}}
composer dump-autoload
```
4. Install the **Container extension (EXT)**.
5. Go to **Admin Tools → Upgrade** and click **Run Upgrade Wizard**.
6. Execute the **Grid to Container Migration** wizard.
7. Go to **Admin Tools → Extensions**, then **deactivate and delete**
**Grid Elements (EXT)**.
8. Go to **Admin Tools → Maintenance** and clear the cache again.
After completing these steps, all **grids (including structure and data)**
will be successfully migrated from **Grid Elements (EXT)** to the
**Container extension (EXT)** in TYPO3.
## Upgrade Product ≥ v13.0.2 (Migration from FlexForm Elements to Content Blocks)
From version **13.0.2** onwards, this product introduces major changes by
migrating from outdated **FlexForm-based elements** to modern
**Content Blocks (EXT)**. Please follow the step-by-step migration guide below.
1. Go to **NITSAN → License Manager** and update **T3Karma Theme (EXT)** to the latest version.
2. Make sure the **Content Blocks extension (EXT)** is installed, as it is required for this migration.
3. Go to **Admin Tools → Maintenance** module and clear the cache. Also, click on the **Dump Autoload** button. For composer-based TYPO3 installations, run the following command:
```bash theme={"theme":{"light":"github-light","dark":"github-dark"}}
composer dump-autoload
```
Before running the **Upgrade Wizard**, please ensure that you create a **backup of your database**.
1. Go to **Admin Tools → Upgrade** and click **Run Upgrade Wizard**.
2. Click the **Execute** button for **T3Karma: Content Block Migration**.
Due to a technical limitation, **Carousel elements** cannot be migrated automatically to **Content Blocks** and must be migrated manually.
After completing these steps, all **Custom Elements (structure and data)** will be successfully migrated from **FlexForm Elements** to **Content Blocks (EXT)**.
## Figures
