When you receive this message there could be a number of reasons behind it:
You are trying to move your Trello account to a different Placker account.
You are still logged in with a different Trello account, and try to log in with another one.
You just signed up as a new user while you are already a user.
Keep using Placker on your 'old' account:
When you are already a Placker user and you want to keep using your old account, you should:
Move your Trello account
You can only be connected to Trello with one Placker account at the same time. When you want to move your Trello account, you will first allow it to move.
Take the following steps to allow your Trello account to be moved:
Then go to your profile and allow this Trello account to be moved
Then link your Trello account to the new Placker account:
Log in to Placker with your new Placker account
And connect Trello with this account, from your profile
Please use the chat to reach us for further assistance!