Train the model question

Train the model

model.fit(X_train, onehot_Y_train, epochs=150, batch_size=10)

gives error message below:
NameError Traceback (most recent call last)
in
1 # Train the model
2
----> 3 model.fit(X_train, onehot_Y_train, epochs=150, batch_size=10)

NameError: name ‘onehot_Y_train’ is not defined