[otrs] Customer Information ($Data{"CustomerTable"} in AgentTicketZoom.dtl)

Hello, I would like to change $Data{"CustomerTable"} in AgentTicketZoom.dtl, because I do not like what it gives me. When, I enable customer_ids Customer information in AgentTicketZoom shows me all this CustomerIDs (for example CustomerA;CustomerB;...;CustomerZ). How could I change it to show me only CustomerID? The same happens, when I try to print a ticket. I am getting CustomerIDs instead of CustomerID. Thank You for help. -- mv