Not Assigned Fincl Statement Item (s) for 0FIGL_V10_Q0001

Hi All,

I have with this query 0FIGL_V10_Q0001 (Balance Sheet),where certain G/L account's are group into "Not Assigned Fincl Statement Item (s)" nodes and some are group into respective hierarchy nodes. This hierarchy is replicated from the source system and it is mapped accordingly.

May i know how to solve this and what is the reason behind it?. From BI, i could see that the G/L account is mapped accordingly.