I had this also a time ago. The vertical detector on the printhead was moved a little bit.
Found some topic of re-adjusting/resetting on this forum; forgot where exactly, hope you can find it 
Edit : found Autohoming / Bedleveling not working - Sovol SV06 Fully Open Source 3D Printer - Sovol3d forum and Auto Home crashes into bed - Sovol SV06 Plus - Sovol3d forum