（初学者问题，求答案）请问一下数据表的错误

3.
buyername(采购员)     SKU_Managed(采购的产品号)   collegeMajor(采购员管理专业)
Nancy meyers              101100                     Art
Nancy meyers              101100                     info systems
Nancy meyers              101200                     Art
Nancy meyers              101200                     info systems
pete Hansen               100100                     business
pete Hansen               100200                     business