I got a notice when I open a month calendar. The message is

Notice: Undefined index: TIME_START in C:\Program Files\Apache Group\Apache2\htdocs\urbaconCRM\modules\Tasks\meta data\additionalDetails.php on line 35

I checked the table tasks and there is no such an index created. Does this mean my installation is incompleted? If I need to create an index, how to do it? Thanks!