Remove all previous version MPI and reinstall correctly it

Question

I got some errors from mpi, mpich in UBUNTU 18.04, how can I remove all previous version MPI correctly.

||/ Name           Version      Architecture Description
+++-==============-============-============-================================= 
un  libblacs-mpi-d <none>       <none>       (no description available) 
ii  libboost-mpi-d 1.65.1.0ubun amd64        C++ interface to the Message Pass 
ii  libboost-mpi-p 1.65.1.0ubun amd64        C++ interface to the Message Pass 
un  libboost-mpi-p <none>       <none>       (no description available) 
un  libboost-mpi-p <none>       <none>       (no description available) 
ii  libboost-mpi-p 1.65.1+dfsg- amd64        C++ interface to the Message Pass 
ii  libboost-mpi-p 1.65.1+dfsg- amd64        C++ interface to the Message Pass 
un  libboost-mpi1. <none>       <none>       (no description available) 
ii  libboost-mpi1. 1.65.1+dfsg- amd64        C++ interface to the Message Pass 
ii  libboost-mpi1. 1.65.1+dfsg- amd64        C++ interface to the Message Pass 
ii  mpi-default-bi 1.10         amd64        Standard MPI runtime programs (me 
ii  mpi-default-de 1.10         amd64        Standard MPI development files (m 
ii  mpich          3.3~a2-4     amd64        Implementation of the MPI Message 
ii  python-mpi4py  2.0.0-3      amd64        bindings of the Message Passing I 
un  valgrind-mpi   <none>       <none>       (no description available)

Thanks a lot in advance!