NEED HELP TO UNDO a bad merge :(

I JUST MADE A BAD MERGE
I just i post to ask for help to undo it ???
https://www.geni.com/merge/compare/6000000149377494821?return=match...

[[/6000000149377494821]]

& Ann Thomson

Ann Thomson - Rennie (RANNEY)

Ann Thomson

https://www.geni.com/merge/compare /6000000149377494821?return=match%3B&to= 6000000002473659229

someone said i need the url - but; when i post it; it seems to disappear
https://www.geni.com/merge/compare /6000000149377494821?return=match%3B&to= 6000000002473659229 (and; likely have to take out the space between compare/6000 - and, there might be a space between the last equal =600)

Looked after, thank you so very much :)