Impossible to switch from an account to an other

Hello, 

I have two adobe accounts. 

One for Adobe acrobat, an other for lightroom.

When I open light room, it automaticaly connect my "adobe acrobat" account and said "I reach the free trial period expiration".

And when I'm trying to disconnect and connect to my "adobe light room" account with a full subscription, adobe refuses and "automaticaly" connect my adobe accobat account.

In other word it is impossible to switch from a "free" account to a "payable" account.

Thanks for your trips.