To overwrite a cell definition while extracting a cell model

Open Extract Cell Model dialog (Right-click on the parametric cell definition in the cell library dialog and select Extract Model )

In the Extract To field, click the browse button.

Select the DGN file you wish to extract.

The Overwrite Model Name prompt appears.

Note: The prompt appears only if the destination DGN file contains the exact model name as that of selected in the model name.

Click Yes to accept and No to cancel overwrite.

The library cell is now updated.