fix: Table reference without table validation.

[EdwinBetanc0urt]

when using a key reference that does not have table validation it generates an sql for the display column that is incorrect and prevents the flow.

SELECT  C_ProjectTask.*, 
    AS "DisplayColumn_Responsible_ID"
FROM C_ProjectTask

Now it is just omitted from the sql query.

SELECT  C_ProjectTask.*
FROM C_ProjectTask