'An item with the same key has already been added' appears on picker control
kbt151282
PRODUCTIssue
This issue occurs on a picker control, when using a SmartObject based off of a Stored Procedure as the data source.
Symptoms
The issue appears to be caused by having stored procedure input parameters having the same names as columns of select statement of the stored procedure.Resolution
K2 Labs team is currently investigating this issue.
As a workaround, you will need to modify the stored procedure to have unique input parameters different from the column names of the select statement.