Verified in 6.1.8 Compose 1 when restrict_composite_view = 'true', user cannot promote to any environment of which the contained content is not already a member, and an appropriate error message is thrown when restrict_composite_view = 'false', no such restriction exists and promotion is allowed.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2016:0475