Using whitner in the flat registration document before scan

I registered my flat today.

 In the thumb impression section (behind the 1st page stamp paper). Constructions owner (builder) signed in my signature space (row adjacent to my photo) by mistake. Then, I signed above that signature adjacent to my photo. Later, we used whitener to remove/hide the Builder signature in front of the sub registrar staff. Builder again signed in the appropriate place in the 2nd column adjacent to his photo.

 This was happened in the registration office BEFORE the registration/scanning of the document.

 My worry is, later date if I want to sell, using whitener will cause an issue

Thanks,
Raju