Huge support reactions for support of shearwall (modeled using parametric)

Why do I keep having very big reactions for the support of modeled shearwall? When i modeled my structure, the reactions was around 1900Kn but when I incorporate a shear wall (which is modeled using parametric) it shows very large reactions which is 7000Kn. Can someone help me? Is this true for all cases that it has very large reactions? Or is there something wrong with my model?