Hi @Oya-Erdayı
did your purge the objects completely?
It looks like that you have still archived or deleted objects created for the object type.
If you have still archived, deleted or maybe unfinished objects you can purge them in the system administration of i-doit:
Administration → Systemtools → Cache / Database → Objects or Categories
You can checkout the following article for further information about the IT documentation lifecycles https://kb.i-doit.com/display/en/Life+and+Documentation+Cycle#LifeandDocumentationCycle-LifecycleoftheITDocumentation
best
Phil