While working on Express JS with mongoose, I encountered an error message that states "student validation failed: fees: Path `fees` is required. at ValidationError". What does the error mean?

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The error message "student validation failed: fees: Path fees is required. at ValidationError" indicates that while using Mongoose to save a student object to the database, the validation process failed because the field "fees" is required but was not provided. Therefore, Mongoose will not save the student object to the database until this required field is provided.