/usr/share/maven-repo/org/codehaus/plexus/plexus-container-default/1.6/plexus-container-default-1.6.jar is in libplexus-container-default1.5-java 1.6-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/maven-repo/org/codehaus/plexus/plexus-container-default/1.6/../../../../../../java/plexus-container-default-1.5.jar