When you switch over to the state it usually asks if you want to transfer the state info and you have to choose yes or no....you choose Yes and it gives you that message?

Go back into the 2018 program and open that client file, switch over to the state and make sure it looks correct, save and exit.

Now go back to the 2019 program and in a regular Homebase view (not the EFCenter) right click on the client file and delete that client and then try to retranser it.