'VLAN MA' detected the 'warning' condition 'The interface is invalid (no VLAN IDB)'

Found a bug where the model cleared but were unable to commit a sub-interface to an existing interface on IOS-XR 6.1.2 (submitted case 681760171) 

commit-reply

<?xml version="1.0"?>

<rpc-reply message-id="urn:uuid:00f97ce8-f526-4677-83b1-0380491c8744" xmlns:nc="urn:ietf:params:xml:ns:netconf:base:1.0" xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">

<rpc-error>

  <error-type>application</error-type>

  <error-tag>operation-failed</error-tag>

  <error-severity>error</error-severity>

  <error-path xmlns:ns2="http://cisco.com/ns/yang/Cisco-IOS-XR-ifmgr-cfg" xmlns:ns1="http://cisco.com/ns/yang/Cisco-IOS-XR-l2-eth-infra-cfg">ns2:interface-configurations/ns2:interface-configuration[active = 'act' and interface-name = 'GigabitEthernet0/0/0/19.444']/ns1:vlan-sub-configuration/ns1:vlan-identifier/ns1:first-tag</error-path>

  <error-message xml:lang="en">'VLAN MA' detected the 'warning' condition 'The interface is invalid (no VLAN IDB)'</error-message>

</rpc-error>

</rpc-reply> 

In order to solve this: it was found that

interface_configuration.interface_mode_non_physical = xr_ifmgr_cfg.InterfaceModeEnumEnum.default

needed to be added to code for the interface .  For future readers,please note that  this is an XR defect.  It's not related to YDK or even the model specification.  XR defect is CSCvd05692.