I added a field in ExpenseJournalLineEntity which is already exist in its one of the data Souce of data entity i.e. AssessableValue_IN and table name is LedgerJournalTrans, I just drag and drop that filed from data Source field to entity field, and then I added that field in it's staging table to, After that I refreshed all the data entity's but still that filed is not there when i add new field to map staging filed to target filed? do I need to add that filed in it's view to?
also can i add new data Source in that data entity?
Regarding your other questions:
thnaks Martin Dráb its work.