C2W4 Failed assignement with correct code

I have a correct code with expected output for C2W4 How can I solve it ?
There was a problem compiling the code from your notebook. Details:
Found unknown categories [0, 5, 7, 10, 14, 21] in column 0 during transform

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Send me your notebook via dm such that I can check where it went wrong. By clicking on the profile picture, you will see an option to message. There you can attach your notebook. Then we can discuss the issues here, under the topic you created.

With regards,
Nilosree Sengupta