@owais.hussain you can think of the legacy UI as deprecated because technically it is, therefore when building a module for the 2.x UI it’s pointless to add an AdminList extension, the best thing to do is to remove it from your config.xml file. This is what we’ve been doing for modules built for the reference application and in general for the 2.x UI, I think the module wizard also needs to be updated to do this automatically.