BEGIN:VCALENDAR
PRODID:CommuniGate Pro 6.2.5
VERSION:2.0
BEGIN:VEVENT
DTSTAMP:20180813T160004Z
UID:1c441c1b-8ca7-4898-b670-49ce30a7137b
SEQUENCE:2
SUMMARY:some summary
DTSTART:20161007T073000Z
DTEND:20161007T160000Z
LAST-MODIFIED:20161018T095049Z
CREATED:20161018T094913Z
PRIORITY:5
X-LIC-ERROR;X-LIC-ERRORTYPE=VALUE-PARSE-ERROR:No value for SUMMARY property. Removing entire property:
END:VEVENT
END:VCALENDAR