Error creating surrogate key

Hi am in jdeveloper 11.1.1.7.0 trying to create the surrogate key, that's what I did, I'm going to my entity and create a new attribute with a type of DBSequence and I go to VO I add this new attribute, now when I test my BC am getting error that the attribute is not in my VO query below wht could be the problem

(oracle.jbo.AttributeLoadException) Houston-27022: could not load the value at index 5 with java object of type oracle.jbo.domain.DBSequence because of java.sql.SQLException.

-Level 1: retail - 0

index column (java.sql.SQLException) not valid

Yes, if you make any attribute as the key, you must have in DB. Another thing how can you identify the line out of it?

Tags: Java

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