BUG of IDEA2020.1

when i new a project of Spring Initializr,

i just check the dependencies of spring web，

and it will create a file named ‘libraries‘ uder the fold '.idea'  automatically ，

when i build the project , it will show a error ： Package does not exist  ：org.springframework.boot  

then i delete the file ‘libraries‘   and  build my project again

it will create a folder named ‘libraries‘ uder the fold '.idea'  within many files  named like Maven__org__.xml 

and then the project run correctly without error

i don't know why  it will create a file named ‘libraries‘ uder the fold '.idea'  automatically  when i new a project

now, i must delete the file named ‘libraries‘ to make sure when i run my project ,it could create a folder named ‘libraries‘ correctly

i need your help, if you know how to resolve this problem , please reply me  to my email 845765654@qq.com ,

Thanks!