Excel Import Leads "Do not allow Bulk Emails" is not set

Hello all,

I'm trying to import a file with several Leads, everything is well, but when i try to set the option "Do not allow Bulk Emails" to "Allow", in the CRM it still "Do Not Allow".

The field on the form is not locked and i can change it by hand.

CRM Version:

8.2.2 - On Premise

Could you please give me a hint to how to resolve it?

Thank you in advance.

RR