Don't update wrong info without knowing anything. 53177 is an unreserved train and although the return train has been mentioned here as 53178, but these two don't share rake with each other.
53178 has sleeper class in it's CC, but not 53177. If you haven't noticed it at all, then why are you making certain assumptions and updating TL entries here?
Please refrain yourself from doing this. Please remember, TL entries should not come from assumption. Make entries only if you are 100% sure.