Use case

When an entity is deleted, filters with this entity in their values are still present in the platform.

Current Workaround

If an entity is deleted, what do we do with elements with this entity in their filters?
Example of concerned filters: labelledBy (a deleted label) / contains (a deleted entity) / fromId / toId / createdBy...
Example of elements that can have such deprecated filters: triggers, streams, taxii collection, entity lines display...

Example: a stream with a filter pointing to a deleted entity.
What do we do with the stream?
- delete the stream ?
- mark the stream as deprecated ?
- delete the deprecated filter in the stream? (and even delete the stream if no filter is remaining)