Cannot change label name through page composer

Content

Hello,

I am trying to change a section label name as you can see in the attached picture.

In other words, I would like to replace CREA REPARTO: DESCRIZIONE into CREA DIPARTIMENTO: DESCRIZIONE through page composer.

I have tried by creating a sandbox, but if I replace the original text with a new one, the change unexpectedly appears in other tasks (i.e. Manage Person; Manage Positions; and so on).

Thanks in advance for your time!

Regards,

Valerio