There's a number of safe and less safe method to tackle this issue,
but the safest sequence would be:
First off, make sure you have a current backup.
Then use 'sdetable -o delete' (as the owner)
Then use SQL to create a table with that name
Then use Catalog to delete it again.
Finally, you can copy the table back into the database.
Keep in mind that this will restore a single table. If it was part of a
versioned feature dataset, contact Tech Support for the best method
to retain as much data as possible.
- V