This question is not complete. For example, are all the greyed out faces already solved?
Now, when solving a Rubick's cube by the beginners solution, you're supposed to form a cross on your
U layer/face with all the edges atop their respective centre squares. That would prevent you from having a configuration like this.
One quick fix might be
R'U'RUR' and then you'll have to fix your corners on
But if I were you, I'd turn
U 45deg and pop the centre edges and swap them!
Hope this helps.