Unable to add accounts to FCCS_Common Stock

Summary

FCCS_Common Stock allows no children with Data Storage "Store"

Content

Hello, attempting to load account dimensions and, the client has several common stock accounts. I would think I can add them to FCCS_Common Stock but, since the data storage is set to "Store" it does not allow children. It is an out of the box account so, I cannot edit the properties. Any thoughts?

 

Thanks