ios – Swift Merging Audio Information causes “Think about using asynchronous different perform”

I’m merely attempting to merge an array of audio recordsdata. Each stack overflow thread for that is outdated and would not work. I get the warning “Think about using asynchronous different perform” on exportSession?.exportAsynchronously {. Im unsure why this occurs. I would respect the assistance.

    func mergeAudios(recordings: [Recording], completion: @escaping (_ exporter: AVAssetExportSession) -> ()) async {
        let composition = AVMutableComposition()
        var lastTime: CMTime = .zero
        
        guard let audioTrack = composition.addMutableTrack(withMediaType: .audio, preferredTrackID: kCMPersistentTrackID_Invalid) else { return }
        
        for recording in recordings {
            let asset = AVURLAsset(url: recording.fileURL)
            
            do {
                strive await audioTrack.insertTimeRange(CMTimeRange(begin: .zero, period: asset.load(.period)), of: asset.loadTracks(withMediaType: .audio)[0], at: lastTime)
            } catch {
                print(error.localizedDescription)
            }
            
            do {
                lastTime = strive await CMTimeAdd(lastTime, asset.load(.period))
            } catch {
                print(error.localizedDescription)
            }
        }
        
        // MARK: Temp Output URL
        let tempURL = URL(fileURLWithPath: NSTemporaryDirectory() + "MergedAudio-(Date()).mp3")
        
        let exportSession = AVAssetExportSession(asset: composition, presetName: AVAssetExportPresetAppleM4A)
        exportSession?.outputFileType = .m4a
        exportSession?.outputURL = tempURL
        
        exportSession?.exportAsynchronously {
            completion(exportSession!)
        }
    }
public struct Recording: Hashable {
    public let uid: UUID
    public var fileURL: URL
    
    public init(fileURL: URL) {
        uid = UUID()
        self.fileURL = fileURL
    }
}