Hi Pavan,
one way to achieve this is to split the simulation into two parts (i.e. separate OGS models/runs): one with the traction load, one with the displacement BC. You might have to be careful to properly transfer the internal state of your material model (if it has one, I’m not sure in your case) from the first to the second simulation.
Another approach is to use Python BCs, see my answer to your other question.