Failed to install Subversive plug-in in RSA for WebSphere

As I want to install Subversive plug-in to IBM Rational Software Architect (RSA) 7.5, it complained this strange error message:

Cannot complete the request. See the details.

Unsatisfied dependency: [com.ibm.rational.clearquest.linux.feature.group 7.1100.0.v200912012238] requiredCapability: org.eclipse.equinox.p2.iu/com.ibm.rational.common.core.linux/[7.1100.0.v200912012238,7.1100.0.v200912012238]

Unsatisfied dependency: [com.ibm.rational.clearquest.aix.feature.group 7.1100.0.v200912012238] requiredCapability: org.eclipse.equinox.p2.iu/com.ibm.rational.common.core.aix/[7.1100.0.v200912012238,7.1100.0.v200912012238]

Unsatisfied dependency: [com.ibm.rational.clearquest.solaris.feature.group 7.1100.0.v200912012238] requiredCapability: org.eclipse.equinox.p2.iu/com.ibm.rational.common.core.solaris/[7.1100.0.v200912012238,7.1100.0.v200912012238]

It seems that it have some dependency issues as I install this plug-in.

Solution: uninstall three existing plugins together: Rational ClearQuest AIX Feature, Rational ClearQuest Linux Feature, and Rational ClearQuest Solaris Feature. Then reinstall the Subversive plug-in.

The root cause is still unknown. According to IBM's technical document, it said "This defect is under investigation, and there is no permanent fix at this time." IBM SUCKS!

Reference: http://www-01.ibm.com/support/docview.wss?uid=swg21363914