mysql userpref

I am begging for help because after many days of searching for a 
solution on the internet, unfortunately without a positive result.
I added the following entries in the amavisd-new-2.12.2  configuration:
# use userpref SQL connection from SA local.cf for ALL recipients
@sa_userconf_maps = 'sql:';

# use recipient email address as "username" in "userpref" mySQL table
@sa_username_maps = new_RE (
   [ qr'^([^@]+@.*)'i => '${1}' ],
);

I am attaching the log from: amavisd debug-sa
Unfortunately, I do not see why individual settings for users from the 
"userpref" table are not downloaded.