Duplicate entry 'defaultCountry' for key 'PRIMARY'

Hi there,

I just downloaded Version: 4.2.0 and I'm getting the error below when I try to save the changes I make to Settings.

An error has occurred.
1062 Duplicate entry 'defaultCountry' for key 'PRIMARY'

Thanks!

Go to MySQL, in the xxxxx_jem_config table, look for if DEFAULTCountry exists, delete and save the JEM setting again.
The right entry must be defaultCountry
Tell me, if it works.

It worked. Thank you so much.