The elements deleted by control_mesh_delete_geometry (with the same index), will be deleted by a factor factor_0 at the start of the timesteps up to a factor factor_1 at the end of the timesteps. If the control_mesh_delete_geometry is not used in cobination with timesteps, then directly factor_1 will be applied.
If this record is not specified then factor_0 = 0 and factor_1 = 1.