open github maven project OK in IntellijIDEA but KO when create project from new source

i really DO NOT understand why IntellijIdea CAN NOT resolve my dependencies
when i use the menu : new project from existing source.

The consecutive steps are :

1/ git clone a project on my hard disk
2/ test the terminal command : mvn clean compile ==> OK

So, the project IntellijIdea is not yet created.

Now, in IntellijIdea, if i use the menu :
File | Open ==> build OK. dependencies resolved

in IntelllijIdea, if i use the menu :
File | New Project From Existing Source ==> build OK. dependencies NOT resolved !!!!