Parent XXXX has different children in ParentH1 and ParentH2

Hello,

Due to some changes, I have to maintain a hierarchy . Basically there are some changes in top level. Currently we have 2 hierarchies and the structure like below.

ID                 P1                          P2

A                 Empty                     Empty

B                 A                            Empty

C                 B                            Empty

Z                  Empty                    Empty

Y                  Empty                    Z

X                  Empty                    Y

D                  B                           Y        

Here D is also a parent node. when I process the dimension, i'm getting error like Parent D has different children in ParentH1 and ParentH2. I have other parents with different parents but they were fine. Please let me know if I am missing something here.

Thanks.