libsnmp-base breaks the ubuntu upgrade

On terminal trying to upgrade Ubuntu-18.04 to Ubuntu-20.04LTS using below commands

$ sudo apt-get update
$ sudo apt-get upgrade --yes
$ sudo apt-get dist-upgrade --yes

$ sudo apt-get dist-upgrade --yes
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Error!
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 libsnmp-base : Breaks: snmp (< 5.7.3+dfsg-5) but 5.7.3+dfsg-1.8ubuntu3.6 is to be installed
E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.

Have downloaded and installed using dpkg --force-all -i libsnmp-base_5.7.3+dfsg-1.8ubuntu3.6_all.deb and --fix-broken couldn't help to fix.

$ sudo apt --fix-broken install
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 363 not upgraded.

Still resulting same error. Any pointer to fix this error will be helpful.

Aptitude may help you to fix the issue. If it is installed please use it as follows

sudo aptitude dist-upgrade

to get newest dependencies on existing system and then follow its recommendation for possible solution.

If it is not installed please install it by sudo apt-get install aptitude and retry with above command.

And only when all dependency issues are fixed on 18.04 LTS you can run upgrade procedure to 20.04 LTS using sudo do-release-upgrade (in GUI) or update-manager -c (on desktop) .