Bug generating project with blank property

I've created an archetype with several required properties.

I've tried to create a project using the command "archetype:generate", and I've enter an space as the value of one of those required properties.
When I finished defining property values, console prints an infinite loop with the info about my properties:

[WARNING] Archetype is not fully configured
[INFO] Using property: groupId = rrr
[INFO] Using property: artifactId = rrr
[INFO] Using property: version = rrr
[INFO] Using property: package = rrr
[INFO] Using property: databaseDriverClass = rrr
[INFO] Using property: databasePassword =
[INFO] Using property: databasePlatform = rrr
[INFO] Using property: databaseUrl = rrr
[INFO] Using property: databaseUsername = rr
[INFO] Using property: logFileName = rr
[INFO] Using property: projectName = rr

The output never ends until I cancel the process.