Problem:

I ran a local site on WordPress Studio (SQLite) and hit a fatal error during Toolset’s upgrade when it tried to ALTER TABLE wp_toolset_relationships to add the autodelete_intermediary column (duplicate column error), preventing access to the admin side.

Solution:

This environment isn’t supported by Toolset; the fix was to use a standard WordPress stack with MySQL/MariaDB (e.g., MAMP/WAMP/Local WP/XAMPP) or migrate to a regular host, after which the issue no longer occurred.

Problem:

I couldn’t update my site even though my Toolset license was active; it showed the error “Unable to register: Site key not matching.”

Solution:

Unregistered and re-registered Toolset via WordPress Dashboard → Plugins → Add New → Commercial tab → Unregister Toolset → Register Toolset → Get a key for this site → paste the new key and confirm. This resolved the license mismatch error.

Relevant Documentation:

https://toolset.com/faq/how-to-install-and-register-toolset/