Description of problem:
After successful yum upgrade spacewalk:

# spacewalk-schema-upgrade 
Schema upgrade: [spacewalk-schema-0.2.5-1.el5.sw] -> [spacewalk-schema-0.3.4-1.el5.sw]
Searching for upgrade path: [spacewalk-schema-0.2.5-1] -> [spacewalk-schema-0.3.4-1]
Searching for upgrade path: [spacewalk-schema-0.2.5] -> [spacewalk-schema-0.3.4]
Searching for upgrade path: [spacewalk-schema-0.2] -> [spacewalk-schema-0.3]
Was not able to find upgrade path in directory [/etc/sysconfig/rhn/schema-upgrade].

# ls -l /etc/sysconfig/rhn/schema-upgrade/
total 16
lrwxrwxrwx 1 root root    27 Oct 30 11:57 rhn-satellite-schema-5.1-to-spacewalk-schema-0.2 -> satellite-5.1-spacewalk-0.2
drwxr-xr-x 2 root root 12288 Oct 30 11:57 satellite-5.1-spacewalk-0.2
drwxr-xr-x 2 root root  4096 Oct 30 11:57 spacewalk-0.2-spacewalk-0.3

Supposedly spacewalk-schema-upgrade is unable to find upgrade path
because of missing link in /etc/sysconfig/rhn/schema-upgrade
spacewalk-schema-0.2.5-1-to-spacewalk-schema-0.3.4-1 pointing to
spacewalk-0.2-spacewalk-0.3

Version-Release number of selected component (if applicable):
spacewalk-schema-0.3.4-1.el5.sw