[ solved ] Error on tried import comments

[rslemer]

When I tried impor comments, system shows error at created cbCalendar db

At log
2018-07-23T18:24:40+00:00 DEBUG index Prepared sql query parameters : [110665]
2018-07-23T18:24:40+00:00 DEBUG index Prepared sql query being executed : INSERT INTO vtiger_activity_reminder_popup (semodule, recordid, date_start, time_start, status) VALUES (?,?,?,?,0)
2018-07-23T18:24:40+00:00 DEBUG index Prepared sql query parameters : [Calendar,110665,????,]
2018-07-23T18:24:40+00:00 INFO  VT PearDatabase ->ADODB error  Query Failed:INSERT INTO vtiger_activity_reminder_popup (semodule, recordid, date_start, time_start, status) VALUES (?,?,?,?,0)::->[1048]Column 'time_start' cannot be null
2018-07-23T18:24:40+00:00 INFO  VT PearDatabase ->TRANS Rolled Back
2018-07-23T18:24:40+00:00 INFO  VT PearDatabase ->TRANS Completed
2018-07-23T18:24:40+00:00 INFO  VT PearDatabase ->TRANS saveentity ends