Undo Merged track logic pro x

[Wail]

Hello good peoples,

 

Please help me i'm a amateur who made a very stupid amateur mistake.

 

for a song i sampled a great loop. Underneath the loop the singer sang the hook (chorus). Now i don't know how i did this but i merged the hook (chorus) into the sample. And i saved the project.

 

I tried control z allot of times but i ain't able to get back to the point where it merged. Now it's just 1 track with merged.

 

Is there any possibility to undo this? please help! Thank you