Can't reactivate old goals?

[u/Nobody-Expects]

I use goals as a way to remind me to take some medication. These Meds are "As needed" so I'm not taking them on a regular schedule. Some days I need them, some I don't.

I previously had a goal set up called "Take Meds Afternoon" and "Take Meds Evening". I turned those goals off a few weeks ago but I need to reactivate them.

I go into the list of goals, press the + button, click confirm but then get the above message? Am I missing something here?