There is a solution to this that doesn't involve the wiping of the device
Assuming that you've got the correct APNS cert now installed in the Meraki Dashboard, and that you've got the correct ADE profile assigned to the device
Open Terminal on the device
Type:
sudo profiles renew -type enrollment
You'll be prompted for the currently logged in user's password
In the top right hand corner of the screen, you'll see:
Click Update
Now, open System Preferences, and navigate to Profiles
You'll now have the ability to Update the MDM profile, essentially re-enrolling the machine, and fixing your APNS cert issue at the same time
NOTE: This is a VERY powerful command, so, be careful!