Need to delete specific cookie from client browser when APM session is closed

Thank you for suggestion, Dario but it is the same problem. When I am trying to create suggested iRule, F5 tells me: command is not valid in current event context (ACCESS_SESSION_CLOSED)][HTTP::header insert "Set-Cookie" "MyCookie=deleted;expires=Thu, 01-Jan-1970 00:00:01 GMT;path=/"]

It is pretty much aligned with what documentation says about ACCESS_SESSION_CLOSED event The iRule commands which require a flow context (for e.g. TCP, HTTP and SSL commands) can not be used in this event"