AF Token present before mount (Reason is AF Token File Exists before AF Mount)

Hadn't seen this one before, so thought I'd better get it written down, before I forget how to fix it!

Microlite edgemenu giving the following error:

AF token present before mount

This is another historic site using af0/fsp0 attached file systems, and not SharpDrive.

I can't be fussed to change the config, I just need it to work.

In this example the fsp0 gets mounted onto af0. 

Our af0 is /usr/lib/edge/system/mnt/af0

Change directory to your af0 folder and then check with an ls -al

I expect you to see a .edge_af file - delete it!

rm .edge_af

Test!

Update Oct 2014:
I also had the same but the message was:

Reason is AF Token File Exists before AF Mount 

My mount path has also changed in v3 to :
/opt/microlite/backupedge/system/mnt/af0/