I got this on both my 15.5 host and 15.5 virtualbox guests :

Is it broken - this is still after an hour

The following 14 package updates will NOT be installed:
  samba samba-client samba-client-libs samba-client-libs-32bit samba-gpupdate samba-ldb-ldap samba-libs samba-libs-32bit samba-libs-python3 samba-python3 samba-winbind samba-winbind-libs samba-winbind-libs-32bit