After upgrade from Satellite 5.4 to 5.6, getting tracebacks from registration.virt_notify "current transaction is aborted"

Issue

• Problems with Satellite after upgrade from 5.4 to 5.6
• Red Hat Satellite v 5.4.1 Oracle embedded DB on the same host in a KVM machine.
• Updated to Satellite v 5.6.0
• Migrated the database to Postgresql via provided and supported means.
• After the update, activation of the system by rhn- satellite-activate failed because the "virtualization_host " and "virtualization_host_platform " now had less entitlements in the certificate.
• Attempts to rectify resulted in partially removed virtualization_host_platform and virtualization_host entitlements from some machines with others getting a "500 internal error" .
• Removal of problematic hosts and re-registering allowed activation of the Satellite.
• Continuing to see tracebacks similar to the following:

Exception reported from satellite.fqdn 
Time: Thu Nov 21 03:24:02 2013 
Exception type <class 'spacewalk.server.rhnSQL.sql_base.SQLSchemaError'> 
Exception while handling function registration.virt_notify 
Request object information: 
URI: /XMLRPC 
Remote Host: remotehost.fqdn 
Server Name: satellite.fqdn:443 
Headers passed in: 
                 Accept-Encoding: identity 
                 CONTENT_LENGTH: 3997 
                 CONTENT_TYPE: text/xml 
                 DOCUMENT_ROOT: /var/www/html 
                 GATEWAY_INTERFACE: CGI/1.1 
                 HTTPS: 1
...
Extra information about this error: 
SQL Error generated: (99999, 'ERROR:  current transaction is aborted, commands
ignored until end of transaction block', '', InternalError('current transaction
is aborted, commands ignored until end of transaction block\n',)) 

• Repolling of guest entitlements may throw the following traceback:

[Sun Mar 16 06:24:02 2014] [error] Spacewalk 20130 2014/03/16 06:24:02 +13:00: ('Error adding entitlement: (99999, \\'ERROR:  LIMIT must not be negative\\', \\'CONTEXT:  SQL statement "UPDATE rhnServerChannel sc set is_fve = \\\\\\'Y\\\\\\' where sc.server_id in ( select vi.virtual_system_id from rhnServerFveCapable sfc inner join rhnVirtualInstance vi on vi.virtual_system_id = sfc.server_id where vi.host_system_id =  $1  and sfc.channel_family_id =  $2  order by vi.modified desc limit  $3  )"\\\\nPL/pgSQL function "repoll_virt_guest_entitlements" line 1