It depends on how you deleted the component. If you used the Delete Component button then it should have updated the project database (assuming you are working in the active project). If you just erased the component using Autocad's erase function then the database is not updated. If you do this, you have to manually update the project database.
I am working in activ project and I used deleat compoment
I have used AE for several years now and I have never had
this problem until know
It is not just when I erase a compoment,
when a chanse somting in a compoment, signal refrences