I can't find how it is possible to change CommunicationChannel for Web requests (created via customer portal). Before update from 5 version it was working properly - ticket created "via OTRS". After update all new tickets are created via Phone"

In sysconfig there are 4 types (Chat, Phone, OTRS, Email).
System -> Configuration -> Core CommunicationChannel
After update - the ticket is created via customer portal. Before update - the ticket is also created via customer portal. Thank You in advance!