Preparing to unpack .../ghostscript-x_9.25~dfsg+1-0ubuntu0.18.04.1_amd64.deb ...
Unpacking ghostscript-x (9.25~dfsg+1-0ubuntu0.18.04.1) over (9.22~dfsg+1-0ubuntu1.2) ...
Preparing to unpack .../ghostscript_9.25~dfsg+1-0ubuntu0.18.04.1_amd64.deb ...
Unpacking ghostscript (9.25~dfsg+1-0ubuntu0.18.04.1) over (9.22~dfsg+1-0ubuntu1.2) ...
Preparing to unpack .../libgs9_9.25~dfsg+1-0ubuntu0.18.04.1_amd64.deb ...
Unpacking libgs9:amd64 (9.25~dfsg+1-0ubuntu0.18.04.1) over (9.22~dfsg+1-0ubuntu1.2) ...
Preparing to unpack .../libgs9-common_9.25~dfsg+1-0ubuntu0.18.04.1_all.deb ...
Unpacking libgs9-common (9.25~dfsg+1-0ubuntu0.18.04.1) over (9.22~dfsg+1-0ubuntu1.2) ...
Setting up libgs9-common (9.25~dfsg+1-0ubuntu0.18.04.1) ...
Setting up percona-xtradb-cluster-server-5.7 (5.7.20-29.24-0ubuntu2.1) ...
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mysqld: Can't create directory '/var/lib/percona-xtradb-cluster/' (Errcode: 17 - File exists)
2018-10-01T13:04:39.600516Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2018-10-01T13:04:39.615937Z 0 [Warning] WSREP: Node is running in bootstrap/initialize mode. Disabling pxc_strict_mode checks
2018-10-01T13:04:39.778361Z 0 [ERROR] Aborting

dpkg: error processing package percona-xtradb-cluster-server-5.7 (--configure):
 installed percona-xtradb-cluster-server-5.7 package post-installation script subprocess returned error exit status 1