Build uses an other projet

Hello all,

I am facing a strange problem :
I want to compile a projet, the only one in the workspace named testdebug8266
and the build reports errors.

I tried to clean as much as I can,
Project tasks default clean,
Project tasks env d1 clean
I did a rebuild intellisense index,
exit, start again same pb.

Here as some screen shots:


Could you help me to understand what is going on ?

Problem solved I need to put at least one include in the cpp file so it can compile.