Hi,

Thanks for reaching out.

After migrating to Joomla 6, the Behaviour - Backward Compatibility plugin is generally not required for the latest versions of SP Page Builder and Helix Ultimate.

If your site is using the latest compatible versions of SP Page Builder, Helix Ultimate, and other extensions, you can disable the plugin.

However, if disabling it causes errors, it usually indicates that one or more extensions, templates, or custom overrides on the site are still relying on Joomla's legacy APIs. In that case, the plugin should remain enabled until those components are updated or made Joomla 6 compatible.

Best regards,