Open Source Document Management System | OpenKM

Hi,
I am using OpenKM 6.3.2 Community on Ubuntu 14.04.5.
While editing my property groups I made a mistake. Now when I try to open the Metadata administration tab I get this error message:

Application error
Class: com.openkm.core.ParseException
Message: Attribute "type" was already specified for element "select".
Date: Tue Jan 03 9:40:30 CET 2017

And when I click on return I just get sent back to the previous tab.
I'm fairly new to Linux and OpenKM so I have no idea how to solve this problem. Do you have any ideas?
Thank you in advance!

Well, seems like I already solved it myself by locating the "PropertyGroups.xml" file and deleting the attribute that caused the problem using the nano command.

Yes, when you make a mistake with property groups definition you are not able to correct them from Administration UI ( in professional the xml is stored into database what helps this kind of correction from UI, in future we will propage this behaviour to community edition, meanwhile the only solution is modify the xml from the file system as you discovered ).