I have a level 88 that's well developed on FB and on Plariumplay I have a base now at level 77.

Knowing this migration is happening, I linked this account to my FB account.

I'd be interested in knowing though, because on FB some of my friends say things like "Don't download yet as migration isn't ready you'll be level 1" Well what if I already downloaded PlariumPlay and worked up a base on here Pre-Migration. Will this have a negative effect on either one of my bases?

I invested time and effort into both, lots of it. I'm only asking as a concerned customer. I'm also new to PlariumPlay and still learning the ropes on this site, not sure if this is the proper way to ask this question but I did anyways lol.