Redirection of URL not working

Hi,

I have moved one of my main categories (higrometros) below a new category (climatizacion).

Do you know why I still get the two URLs below pointing to the same place?

https://www.airalia.es/higrometros/ — this is the old category
https://www.airalia.es/climatizacion/higrometros/ — this is the new category

I have used this in my .htaccess

RewriteRule ^higrometros/([a-z/.]+)$ /climatizacion/higrometros/$1 [R=301,L]

Thanks in advance, I have spent 1 day already looking into this and searched multiple examples in the forums but they do not seem to work for me.

The page I need help with: [log in to see the link]