Siamese Network Showing Valueerror

I'm using Siamese network for 2000 features with different domains. I want to train on similar pairs and test on dissimilar pair of features. I'm encountering value error when I tr

Solution 1:

I have rectified my error by adding test labels while fitting:

model.fit([left_input, right_input] ,target , epochs=100, verbose=1,validation_data=([test1, test2],ytest))