错误1：The instance of entity type ‘name’ cannot be tracked because another instance with the same key value for {‘Id’} is already being tracked. When attaching existing entities, ensure that only one entity instance with a given key value is attached. Consider using ‘DbContextOptionsBuilder.EnableSensitiveDataLogging’ to see the conflicting key values.

错误2 insert_Identify 验证问题

可能原因为：同一个entity存在被多个context标记为add
1、获取了多个context对象，在netcore一般用同一个context,不要随意的去容器中取，如果没设置好，可能会导致多个context instance同时操作track EF
2、对顶层的entityEntry设置add状态，然后在导航属性又设置一遍

解决方案: 对症下药