I have a master detail link Using Delphi Mysql and Firedac (adquery) I had a screen with the client / contact data, perfectly saved master detail detail used as the example link everything worked perfectly but with no change at all I started to receive the mens [FireDAC] [Dats] -16. Can not process - no parent. constraint [ForeingnKeyConstraint] When I record only the father without including anything in the child it records perfectly but when I include some item in the child appears the mens. I already tried to debug, but the error already happens when writing the parent before even trying to record the child.