[REQUIRED] Step 2: Describe your environment

• Xcode version: 10.3
• Firebase SDK version: 6.6.0
• Firebase Component: Remote Config
• Component version: 4.2.1

[REQUIRED] Step 3: Describe the problem

We fetch and activate remote config with the following code:

let expirationDuration: TimeInterval
#if DEBUG
expirationDuration = 0
#else
expirationDuration = 3600
#endif
firebaseRemoteConfig.fetch(withExpirationDuration: expirationDuration) { [unowned self] (status, error) in
    if status == .success {
        log.info("Remote Config fetched")
        self.firebaseRemoteConfig.activate(completionHandler: { (error) in
            if let error = error {
                log.error(error)
            }
        })
    } else {
        log.error("Remote Config could not be fetched. \(String(describing: error))")
    }
}

We call this part of the code only one, in AppDelegate during didFinishLaunchingWithOptions

In the wild, we see lots of Remote config errors reported, they're pretty straightforward:

ActivationFailureReason: Most recently fetched config is already activated
Code: 8003

Is it an error to try to activate fetched config when it's the same as active one? If yes, which approach should we take?
We can't use the fetchAndActivate since it doesn't have the expirationDuration parameter.