I've been using parental controls successfully for the past few months. When trying to amend the time restrictions on one of the devices it would give me the follwoing error:

If I clicked OK and then cacelled the process the update took anyway.

Now this device is not showing up at all in the "Devices Under Parental Controls" list. If I try to add it I get the same error. I've checked and the device is not being blocked.

I presume there's some coruption in the database/files that hold the configuration.

Any thoughts? I'm hoping to avoid a factory reset as I've got a lot of devices loaded.