- ;; Remove the proper name of the classoid.
- (setf (classoid-name (classoid-cell-classoid cell)) nil)
+ ;; Remove the proper name of the classoid, if this was it.
+ (let* ((classoid (classoid-cell-classoid cell))
+ (proper-name (classoid-name classoid)))
+ (when (eq proper-name name)
+ (setf (classoid-name classoid) nil)))
+