You asked mysql to enforce a relationship between the two tables which it was previously unaware of. Unfortunately the state of the two tables indicates that the relationship is already broken. That's just bad luck.
Now you have some records in the rc_sent_items_table with profile_ids that don't exist in the rc_profile_table.
Check that field rc_sent_items_table. Profile_id_to has appropriate values in accordance with rc_profile_table.id.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.