404 - Path /org/eclipse/equinox/org.eclipse.equinox.concurrent/1.0.0.v20090520-1800/org.eclipse.equinox.concurrent-1.0.0.v20090520-1800.pom not found in local storage of repository "3rd party" [id=thirdparty]

Path /org/eclipse/equinox/org.eclipse.equinox.concurrent/1.0.0.v20090520-1800/org.eclipse.equinox.concurrent-1.0.0.v20090520-1800.pom not found in local storage of repository "3rd party" [id=thirdparty]