Adding an already existing filter to a report usually means skipping the addition of that filter but that's not always the case. e.g. adding a running instance filter twice will only add it once. On the other hand, adding suspended twice will add the filter twice to the panel.
- Find all the filters that cannot be added twice:
- Instance state
- Flow Node status
- Incident filters
- start date, end date
- user task duration time for decision reports
- Adding one of those filters multiple times only result in one filter in the filters panel