Composite key is blank and constraint fails on inserts - mysql

Question

Having an error when inserting my data into this code into my database. I wanted to make the EventStaff have a primary key made up from StaffID.EventID like in this diagram at the bottom. I can't see to see what I'm doing wrong because the table in StaffID is populated and in TypeID. I was trying to create a composite key of two different tables, is this the wrong way to go about it> i've used the diagram reference.
ERROR 1452 (23000): Cannot add or update a child row: a foreign key constraint fails (`db`.`EventStaff`, CONSTRAINT `fStaff1` FOREIGN KEY (`StaffID`) REFERENCES `Staff` (`StaffID`))
And this is the code for the database
CREATE TABLE EventType (
TypeID INT NOT NULL,
Description VARCHAR(200) NULL,
CONSTRAINT pEventType PRIMARY KEY (TypeID)
);
CREATE TABLE Staff (
StaffID INT NOT NULL,
CONSTRAINT pStaff PRIMARY KEY (StaffID)
);
CREATE TABLE Event (
EventID INT NOT NULL,
Description VARCHAR(500) NULL,
Name VARCHAR(100) NULL,
DateStart DATE NULL,
DateEnd DATE NULL,
TimeStart TIME NULL,
TimeEnd TIME NULL,
TypeID INT NULL,
ClientID INT NULL,
NoBands BOOLEAN NOT NULL,
MaxFoodStall INT NULL,
CONSTRAINT pEvent PRIMARY KEY (EventID),
CONSTRAINT fType1 FOREIGN KEY (TypeID) REFERENCES EventType (TypeID),
);
CREATE TABLE EventStaff (
StaffID int NOT NULL,
EventID int NOT NULL,
Role VARCHAR(45) NULL,
PRIMARY KEY (StaffID, EventID),
CONSTRAINT fStaff1 FOREIGN KEY (StaffID) REFERENCES Staff (StaffID),
CONSTRAINT FEvent1 FOREIGN KEY (EventID) REFERENCES Event (EventID)
);
and here are the inserts
insert into EventType (TypeID, Description) values (1, 'Intuitive attitude-oriented hierarchy');
insert into EventType (TypeID, Description) values (2, 'Mandatory executive concept');
insert into Staff (StaffID) values (1);
insert into Staff (StaffID) values (2);
insert into Event (EventID, Description , DateStart, DateEnd, TimeStart, TimeEnd, NoBands, MaxFoodStall, Name) values (1, 'Cloned 6th generation pricing structure', '2018-03-13', '2018-07-20', '11:18 PM', '4:58 PM', false, 17, 'Swaniawski-Ankunding');
insert into Event (EventID, Description , DateStart, DateEnd, TimeStart, TimeEnd, NoBands, MaxFoodStall, Name) values (2, 'Ameliorated mission-critical throughput', '2017-10-11', '2019-01-05', '10:44 AM', '8:26 PM', true, 4, 'Langworth-Ferry');
insert into EventStaff (Role) values ('Editor');
insert into EventStaff (Role) values ('Budget/Accounting Analyst IV');
https://image.ibb.co/jwaxRx/problem.png

Answer 1

The code you posted to this question has typos, and won't even run as is. Once I fixed those, I was able to reproduce your foreign key error. The problem is actually being caused by these last two inserts:
INSERT INTO EventStaff (Role) VALUES ('Editor');
INSERT INTO EventStaff (Role) VALUES ('Budget/Accounting Analyst IV');
You are not specifying values for the StaffID and EventID, and these columns have been marked as not nullable. They are foreign keys, and it would actually have been OK to insert NULL, had you not marked the columns as non nullable. Here is one way to make this error go away:
INSERT INTO EventStaff (Role, StaffID, EventID)
VALUES ('Editor', 1, 1);
INSERT INTO EventStaff (Role, StaffID, EventID)
VALUES ('Budget/Accounting Analyst IV', 2, 2);
I don't know what values you intend to insert, but the above is one way to go here.
Note that in your insets into the Event table, you don't specify a value for the TypeID column, which is also a foreign key. However, in this case, you have marked the column as nullable, so MySQL accepts it.