SYMPTOM:
When validating an attribute form expression, that is mapped to a column, the following error appears:
The columns contact_last_name can't be found in table LU_SUPPLIER.
In order to avoid this error, the same column name can be picked from the list of available columns and moved to the expressions panel.
Another symptom of the same issue can be observed when editing Schema, as the attribute expression column does not seem to be mapped to the table column (it should appear in bold):
CAUSE:
The behavior observed occurs due to the presence of duplicate columns in the project.
ACTION:
Contact Strategy Technical Support in order to get assistance removing the duplicate columns from the project.
