Refactoring failed when 2 Projects open with same function name in header

1.) Create two new Widget appications e.g. "untitledA" and "untitledB" (see Picture 1)

2.) In second project create in h & cpp function named "myFunction"

3.) Go to first project ""untitledA" and add the function ONLY in header file and try

to use refactoring to add it into the cpp file. This option is not shown anymore, see Picture 2)

Picture 1)

Picture 2)