It says: Couldn’t do that

A timer could not be stopped or started again. The line under the title says why:

• It is already running. Someone already started it again, often on another phone. Nothing to do.
• Only the latest one can be resumed. Only the last sleep, feed or pump can go on. For an older one, log a new entry.
• Another one is already running. Stop it first. On Home, tap the stop button of the one that runs, then try again.
• Only the parent who pumps can change this pump. A pump belongs to the parent who started it. Only they can stop it, on their phone.
• That time doesn't fit this one. The time is in the future, or before the start. Pick another time.
• This one has no timer. Only a breastfeed has a timer. A bottle or solids is one moment.
• Something went wrong. Try again. Check your connection, wait a moment, then try again.