Upgrade from 2.3 to 2.4

Hi there ,
I want to upgrade from percona-xtrabackup 2.3 to percona-xtrabackup 2.4 but in order this to be done it tries to remove:

root@emp-sof-test-db01:~# apt install percona-xtrabackup-24
Reading package lists... Done
Building dependency tree 
Reading state information... Done
The following package was automatically installed and is no longer required:
percona-xtradb-cluster-galera-3
Use 'apt autoremove' to remove it.
The following additional packages will be installed:
libcurl3 libcurl4-openssl-dev percona-xtradb-cluster-client-5.6 percona-xtradb-cluster-common-5.6 percona-xtradb-cluster-galera-3 percona-xtradb-cluster-galera-3.x
Suggested packages:
libcurl4-doc libcurl3-dbg libidn11-dev libkrb5-dev libldap2-dev librtmp-dev libssl-dev pkg-config zlib1g-dev
The following packages will be REMOVED:
percona-xtrabackup percona-xtradb-cluster-server-5.6
The following NEW packages will be installed:
libcurl4-openssl-dev percona-xtrabackup-24
The following packages will be upgraded:
libcurl3 percona-xtradb-cluster-client-5.6 percona-xtradb-cluster-common-5.6 percona-xtradb-cluster-galera-3 percona-xtradb-cluster-galera-3.x
5 upgraded, 2 newly installed, 2 to remove and 185 not upgraded.
Need to get 9,001 kB of archives.
After this operation, 56.6 MB disk space will be freed.
Do you want to continue? [Y/n] n
Abort.

The server is

root@emp-sof-test-db01:~# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04.5 LTS
Release: 16.04
Codename: xenial

So is there a normal way for this upgrade without removing percona-xtradb-cluster-server-5.6 since we don’t want Cluster downtime during the update?