Znuny Open Source Ticketsystem

Hello. OTRS automatically locks the ticket, when you change the owner. It locks it to new owner. Is there a way, to disable this feature? I've commented in /opt/otrs/Kernel/Modules/AgentTicketActionCommon.pm strings (they start with #) # set new owner my @NotifyDone; if ( $Self->{Config}->{Owner} ) ...