Unable to Insert row in tableview based on BI Input ready query

Hello,

I have created a VC Model (composite view) based on the BI Input ready query (BI Data source -> query).  I have four columns in the query (Calender year, Account code, Currency and Amount) of which amount is mentioned as Input-ready in BEx Query designer. 

I am able to change & save the amount column for the existing records through table view.  But when I try to create and save a new row in table view, system is giving the error "You cannot perform any table operations( add, copy, delete) in this query"

I have referred to the discussion How to create new records through a VC form in ... | SCN, but could not able to resolve the issue.

I am using VC Version -> Visual composer for SAP Netweaver 7.3 SPS04.

Am I missing anything related to Query design or VC forms design ?

Thanks & Regards,

Vinod