#1452 - Cannot add or update a child row: a foreign key constraint fails (`Appian`.`#sql-alter-34ce-15086d9`, CONSTRAINT `table1_ibfk_2` FOREIGN KEY (`first_id`) REFERENCES `table2` (`first_id`))
What does this error mean?
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If you are establishing the FK relation while creating the CDT, please make sure you provide the fk column name all in small(the column name to be mapped).