Asking for Help about my Result for Collaborative Filtering

Hi there I am asking for help about my collaborative filtering algorithm. I enhanced a collaborative filtering algorithm and compare it with traditional method. I got this result. Why is it that as the number ok K increases the number of errors increases also. May I ask if how to lessen the number of errors in terms of RSME, MAE, MSE. Thank you.n_pred_10_var_rmse_best_fold

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