Characters '/' and ':' cause issues when used within a field as the primary key.
|Reported by:||Owned by:||nobody|
|Has patch:||no||Needs documentation:||no|
|Needs tests:||no||Patch needs improvement:||no|
When a CharField is used as the primary key and the value contains the characters '/' or ':' Django admin interface gets confused when adding a record and issues a 404 error.