When I am at the Configure Data Source, right at the test query part I get this error
There was an error executing the query. Please check the syntax of the command and if present, the types and values of the parameters and ensure they are correct.
Failed to enable constraints. One or more rows contain values violating non-null, unique, or foreign-key constraints.
The thing is when I execute query, it has giving me all the data I need.
Why I get this error?