When importing a json file with more than one calendars, the calendars will be shown as often as calendars are defined in the import file

Current Situation

When a json import file with calendars is imported with JOC Cockpit and the import file contains more than one calendar, the imported calendars will be shown as often as number of calendars are in the import file.

When leaving the view and returning back, only the imported calendars are shown in the list.

Desired Behavior

When importing calendars there should not be double entries in the list.