in src/main/java/org/apache/sling/maven/kickstart/run/ProcessDescriptionProvider.java [46:55]
public synchronized String getId(final String kickstartId) throws Exception {
final String id = (kickstartId == null ? DEFAULT_KEY : kickstartId);
if (configs.containsKey(id) || lockedIds.containsKey(id)) {
throw new Exception("Kickstart Id " + id + " is already in use");
}
String ts = String.valueOf(System.currentTimeMillis());
lockedIds.put(id, ts);
return ts;
}