I am trying to get a new Magento 2.1 store configured, but I have an issue when I try to save the Customer Configuration, where I get the warning: Attribute with the same code already exists.
I thought it was to do with a specific attribute I was changing to start with, but I get the same error without making any changes and just hitting Save on this admin page. No other pages cause me this issue.
How do I find out which attributes are causing the problem here? And how do I resolve the issue?
I'm guessing that something is a little messed up from the data import migration from my Magento 1.9 store, but I had no part of that migration, so not sure where to start checking for issues?
I see nothing helpful in any of the log files to point me to a solution.