When trying to place one of the hosts in maintenance mode, we get the error in the subject line.  I've found the following that looks to be the issue we are hitting: 

I've looked in the engine database with the following command and results:

Full details on these records show that they are indeed old - there are no transfers actually in progress.

Can anyone confirm the correct way to remedy this?  The bug report notes changing the phase on the record in question.  Before I try that, I'd like confirmation if anyone else has seen this issue and resolved it.

And if this is the resolution, can you describe the exact psql commands to achieve this?

Thanks