     receiver_id TEXT NOT NULL,
     receivertip_id TEXT,
     mail_sent INTEGER,
-    FOREIGN KEY(receiver_id) REFERENCES receiver(id) ON DELETE CASCADE,
-    FOREIGN KEY(receivertip_id) REFERENCES receivertip(id) ON DELETE CASCADE,
+    FOREIGN KEY (receiver_id) REFERENCES receiver(id) ON DELETE CASCADE,
+    FOREIGN KEY (receivertip_id) REFERENCES receivertip(id) ON DELETE CASCADE,
     PRIMARY KEY (id)
 );
 

    receiver_id TEXT NOT NULL,
    label TEXT NOT NULL,
    new INTEGER NOT NULL,
    FOREIGN KEY(internaltip_id) REFERENCES internaltip(id) ON DELETE CASCADE,
    FOREIGN KEY(receiver_id) REFERENCES receiver(id) ON DELETE CASCADE,
    PRIMARY KEY (id)
);


    id TEXT NOT NULL,
    fieldanswer_id TEXT NOT NULL,
    number INTEGER NOT NULL,
    UNIQUE (id, fieldanswer_id, n),
    FOREIGN KEY (fieldanswer_id) REFERENCES fieldanswer(id) ON DELETE CASCADE,
    PRIMARY KEY (id)
);
