Foundation elements may overlap with others at the same elevation after manually modifying their geometry or performing the overall design of the foundation.

In this case, you can adjust the geometry again to avoid this situation, or use the "Delete overlaps" option, available in the "Foundations" menu on the “Beam Input” or “Results” tabs, to automatically delete the overlaps.

In this way, the program will place common footings for several foundations at the points where they overlap.