Yum updates reports errors when both JBoss EAP 5 and 6 channels are active

Issue

When we run "yum update", we got the following error:

Error: Package: jbosssx2-2.0.5-9.1.SP3_1_patch_01.ep5.el6.noarch (jb-ewp-5-x86_64-server-6-rpm)
           Requires: jaxb_2_1_api
           Available: glassfish-jaxb-2.1.12-9.ep5.el6.noarch (jb-ewp-5-x86_64-server-6-rpm)
               jaxb_2_1_api = 2.1.12-9.ep5.el6
           Available: glassfish-jaxb-2.1.12-10_patch_02.ep5.el6.noarch (jb-ewp-5-x86_64-server-6-rpm)
               jaxb_2_1_api = 2.1.12-10_patch_02.ep5.el6
           Available: glassfish-jaxb-2.1.12-12_patch_03.ep5.el6.noarch (jb-ewp-5-x86_64-server-6-rpm)
               jaxb_2_1_api = 2.1.12-12_patch_03.ep5.el6
           Installed: glassfish-jaxb-2.2.5-10_redhat_3.ep6.el6.noarch (@jbappplatform-6-x86_64-server-6-rpm)
               Not found
           Available: glassfish-jaxb-2.2.5-4_redhat_1.ep6.el6.noarch (jbappplatform-6-x86_64-server-6-rpm)
               Not found