error on duplicate record

hello I'm running a Moodle 2.7+ (Build: 20140613) site, and I was fixing some bugs, and this happened:

I was changing a  couple of php files and modifying some strings in them, and then I purged all the caches to make the changes worked. After that I was going to check the language customization and this happened:

As mentioned early, it was working so Itried a few solutions that I found here to no avail. I'm more than open to any suggestions.

Thanks,

Brandon