The "park added by new user" filter doesn't work

[RicoElectrico]

I'm submitting a (bug report)

Brief Description

The "park added by new user" filter doesn't work

What is the current behaviour, (attach relevant screenshots) ?

No changesets are shown

What is the expected behaviour ?

Parks added by new users are shown

How do we replicate the issue ?

1. Turn on showing only flagged changesets
2. Add a filter "Park added by new user"
3. Apply filter

Please tell us about your environment:

Firefox 57.0.1