import users from ‘./interface/users’
./server/index.js

上面两个文件以及package.json文件都和github中下载下来的文件一样，代码应该没有问题。
编译报以下错误。

E:\vueProject\mt-app\node_modules_mongoose@5.3.0@mongoose\lib\index.js:407
throw new mongoose.Error.OverwriteModelError(name);
^
OverwriteModelError: Cannot overwrite User model once compiled.
at new OverwriteModelError (E:\vueProject\mt-app\node_modules_mongoose@5.3.0@mongoose\lib\error\overwriteModel.js:20:11)
at Mongoose.model (E:\vueProject\mt-app\node_modules_mongoose@5.3.0@mongoose\lib\index.js:407:13)
at Object. (E:/vueProject/mt-app/server/dbs/models/users.js:19:25)
at Module._compile (internal/modules/cjs/loader.js:689:30)
at loader (E:\vueProject\mt-app\node_modules_babel-register@6.26.0@babel-register\lib\node.js:144:5)
at Object.require.extensions.(anonymous function) [as .js] (E:\vueProject\mt-app\node_modules_babel-register@6.26.0@babel-register\lib\node.js:154:7)
at Module.load (internal/modules/cjs/loader.js:599:32)
at tryModuleLoad (internal/modules/cjs/loader.js:538:12)
at Function.Module._load (internal/modules/cjs/loader.js:530:3)
at Module.require (internal/modules/cjs/loader.js:637:17)
at require (internal/modules/cjs/helpers.js:22:18)
at Object. (E:/vueProject/mt-app/server/interface/users.js:4:1)
at Module._compile (internal/modules/cjs/loader.js:689:30)
at loader (E:\vueProject\mt-app\node_modules_babel-register@6.26.0@babel-register\lib\node.js:144:5)
at Object.require.extensions.(anonymous function) [as .js] (E:\vueProject\mt-app\node_modules_babel-register@6.26.0@babel-register\lib\node.js:154:7)
at Module.load (internal/modules/cjs/loader.js:599:32)
[nodemon] app crashed - waiting for file changes before starting…