Cost Component Structure with Material Ledger

Dear Experts,

I am new with Material Ledger functionality and I am facing cost component structure relevant errors while posting GR against Process Order of Finished Goods and Semi Finished Goods. 

Before Material Ledger Activation, I have not faced this kind of error but after activation I am facing some strange errors.

For Example:

I have assigned Consumption Elements to Cost Component Structure but now system prompts me to assign Inventory Change Element to Cost Component Structure.

Please guide me the solution for this issue?

Regards.

Sapna