Missing AudioSetup values

I keep getting these errors in the log window when I open a project. How do I fix the missing values?

[ERROR]: AudioSetup value for timeout is missing data
[ERROR]: AudioSetup value for dither is missing data
[ERROR]: AudioSetup value for audiomode is missing data

For the benefit of people with the same kind of problem, here’s the simple solution: Remove the ~/.ardour2 directory and the warnings will vanish.