I have found a workaround. If you do apt-get install dpkg (dpkg is already installed so the effect is to upgrade dpkg) then it does this;
The following extra packages will be installed:
liblzma5 multiarch-support xz-utils
Suggested packages:
xz-lzma
The following NEW packages will be installed:
liblzma5 multiarch-support xz-utils
The following packages will be upgraded:
dpkg
1 upgraded, 3 newly installed, 0 to remove and 264 not upgraded.
Once this completes, you can then do the dist-upgrade without warnings
I have found a workaround. If you do apt-get install dpkg (dpkg is already installed so the effect is to upgrade dpkg) then it does this;
The following extra packages will be installed:
liblzma5 multiarch-support xz-utils
Suggested packages:
xz-lzma
The following NEW packages will be installed:
liblzma5 multiarch-support xz-utils
The following packages will be upgraded:
dpkg
1 upgraded, 3 newly installed, 0 to remove and 264 not upgraded.
Once this completes, you can then do the dist-upgrade without warnings