Based on regiond.log, it would appear that the error we're not surfacing is: 2016-07-08 14:18:12 [-] Error on request (1149) node.link_subnet: IP address is already in use.
Based on regiond.log, it would appear that the error we're not surfacing is:
2016-07-08 14:18:12 [-] Error on request (1149) node.link_subnet: IP address is already in use.