Christina Johanna Naude (nee Conwey) B 1844

IN the SAF, Christina Johanna Naude (nee Conwey) B 1844 is linked to Theunis Johannes Naude B 1818. This is incorrect. I need to unlink her from Theunis Johannes Naude B 1818. If I try to do it, a "split tree" message does not allow me to do it even if I am the manager of Christina Johanna Naude. I am Geni Basic.

Christina Johanna Naude (nee Conwey) B 1844 was married to Teunis(Thomas) Johannes Naude B 1844.

I will appreciate your help