Alt+S attempts to run the project

When I press Alt+S in the code editor with an open CMake project QtCreator attempts to build and run the project. In QtCreator settings Alt+S is assigned as the first key combination for SVN actions, such as DiffCurrent (Alt+S, Alt+D), which is what I expect. Run action is assigned to Ctrl+F5, and I don't see any other actions assigned to Alt+S as the first key combination.

I've verified that QtCreator recognizes Alt+S correctly - it displays the key combination in the Target field when I assign it to an action.