Merging two name pages

Hi, I need to merge two accounts that are both in my name. I have a IMDb pro account on the one and don’t remember any login details for the later. I think someone made this account when uploading my work. I now want to merge accounts so that all my work is on one page. 

I can only merge from my IMDb pro account because I know my login details. But will I loose my IMDb pro account when merging onto the other page?

Hope this makes sense!

Thanks in advance