Error when updating RTC 2.x -> 3.0.1.1

Today I finally was ready to run the upgrade script for RTC. I have set up JTS on "machine 2" and set it up using LDAP and everything with the wizard.

On "machine 1" I have the old RTC 2.x installation in /opt/IBM/JazzTeamServer_1 and a new installation of CCM in /opt/IBM/JazzTeamServer.

I have edited the upgrade script configuration /params/ccm_params.sh with pretty much all the parameters, and mounted the remote JTS server as /root/mount/JazzTeamServer/server.

When I run the upgrade script, I get the following error:

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ERROR !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

There is no Public URI defined in
/opt/IBM/JazzTeamServer/server/conf/jazz/teamserver.properties,
therefore the upgrade cannot be started.

There must be one Public URI in this file defined as follows:
https/://hostname.example.com/:port/jazz

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

The Public URI property com.ibm.team.repository.server.webapp.url must be present in the teamserver.properties file.
Add the property to the 2.x teamserver.properties file and set the value to be the URI root that all clients use to reach the server.
The Public URI root is essential for the proper functioning of your 3.0.1.x server. The upgrade will not succeed without this property.
For more information, see the InfoCenter topic on 'Planning your URIs' at:
http://publib.boulder.ibm.com/infocenter/clmhelp/v3r0m1/topic/com.ibm.jazz.install.doc/topics/c_planning_URLs.html

However, in the teamserver.properties file for the old installation, the correct URI is set. Naturally, this is not set in the teamserver.properties file, for the new 3.0.1.1 installation, because I have not created the databases for it and run the setup wizard for this new installation. Should this be done, before I run the upgrade script? What is going wrong here, what is the solution?