This document explains how to change the Team Collaboration Mode Property of a Knowledge Base hosted on GeneXus Server.
The Team Collaboration Mode Property can be set when the Send Knowledge Base to GeneXus Server action is performed. By selecting the 'Work With Lock Model' option the Lock Mode will be enabled, if not, the Merge Mode will be enabled.

Or using the KB Dashboard Tab of the GeneXus Server Console:

Note: the KB Properties of all the Knowledge Bases connected to the GeneXus Server Knowledge Base must be updated after changing the
Team Collaboration Mode Property.