[Samba] Problems updating Samba4

[Marcio B.]

Hi,

I'm having trouble updating my Samba4 4.10.18-Debian, because with 'apt
dist-upgrade' Debian will remove Samba4 and Winbind, as follows:

The following packages will be REMOVED:
libkdb5-8 libnss-winbind libpam-winbind libsmbclient python3-gpgme
python3-ldb python3-samba python3-talloc python3-tdb samba samba-common-bin
  samba-dsdb-modules samba-libs samba-vfs-modules winbind

The VanBelle repository is informed that Samba is already in the newest
version:

 apt-get install -t o=AptVanBelle samba attr winbind krb5-config krb5-user
Reading package lists ... Done
Building dependency tree
Reading status information ... Ready
attr is already the newest version (1:2.4.48-4).
krb5-config is already the newest version (2.6).
samba is already the newest version (2:4.10.18+dfsg-0.1stretch1).
winbind is already the newest version (2:4.10.18+dfsg-0.1stretch1).
The following additional packages will be installed:
  libgssapi-krb5-2 libk5crypto3 libkadm5srv-mit11 libkdb5-9 libkrb5-3
libkrb5support0

Could someone guide me how to update my Samba4?

Regards,

Márcio Bacci