"Unassigned" value for "plannedFor" in Quick query syntax.
Is there a way to reference the "Unassigned" value for the "plannedFor' attribute when making Plan modifications using Quick query syntax? The Quick query syntax reference page at https://www.ibm.com/support/knowledgecenter/en/SSYMRC_6.0.3/com.ibm.team.apt.doc/topics/r_quick_query_syntax.html only shows example of the specific value being assigned such as "plannedFor:Sprint1".