Currently, there is no information for the kie-server (container setup) migration in "Migration Guide"
https://access.redhat.com/documentation/en-US/Red_Hat_JBoss_BPM_Suite/6.3/html/Migration_Guide/chap_migrating_from_6.html

One of our customers is asking about this in support case 01680959 (https://access.redhat.com/support/cases/#/case/01680959).

Customer's comment : "During our upgrade of BPM 6.1.5 to 6.3.3 it has been noticed the kie-server real-time decision server settings did not move over with the upgrade. Is there a way to migrate these settings or do they have to be recreated?"

As far as we know, BxMS 6.2 and 6.3 share some similar architecture that kie-server container data is stored at "$JBOSS_HOME/standalone/data/<server-id>.xml" files, not sure if that a tested / supported scenario that migrating kie-server container setups by copying over these files ?
BxMS 6.1 has some different approach to save these data so it is impossible to migrate this data by simply copying files, however, it would be great if we can provide some explanation and related information.