Given the models [0], when listening for changes and trying to get child from 

DataObjectModification using MvpnRoutes.class. 

Issue seems to be coming from LazyDataObjectModification, when obtaining 

BindingCodecTreeNode which generates PathArgumentes using Ipv6 Module,

when the required one is the Ipv4 Module.

It can be reproduced using patch [1]

[0] https://git.opendaylight.org/gerrit/gitweb?p=bgpcep.git;a=tree;f=bgp/mvpn/src/main/yang;h=cc6cd734b3b1cddd2b957365e32b6c1796dbcb21;hb=refs/heads/master

[1] https://git.opendaylight.org/gerrit/#/c/72160/