Hi,
I have extended the nms:recipient schema to shl:recipient schema. Now I again want to extend the schema. So I am extending shl:recipient to xyz:recipient. I am able to do so but I am not able to see any data on data tab & the structure of schema. I am getting below error:

Is it allowed to extend the already extended schema? if yes, why I am getting the above error.
Your answer is much appreciated.
Thanks,
Darpan