Are you sure it's necessary? it's a comment written by derby.
Emmanuel Carlos Henriquez a écrit :
I just download and follow the instructions from the upgrade page<http://maven.apache.org/continuum/upgrade.html>to install 1.0.3 but one step is missing. After you replace your database folder, you need to open the service.properties file and change the reference from 1.0.2 to 1.0.3 (first line). Otherwise you won't be able to see the web page and continue with the upgrading. Bye.