FlutterError - FileSystemException: Cannot open file

[krushnarout]

WalFileManager.saveWals
FlutterError - FileSystemException: Cannot open file, path = '/Users/bruce/Library/Containers/com.friend-app-with-wearable.ios12/Data/Documents/wals.json' (OS Error: Too many open files, errno = 24)

https://console.firebase.google.com/u/0/project/based-hardware/crashlytics/app/ios:com.friend-app-with-wearable.ios12/issues/d750bb9af126012b20bf8645fb2629f9?time=7d&types=crash&sessionEventKey=4598867f2f8549fa9a8afb4726772e6e_2166886468459049808

logs:

          Fatal Exception: FlutterError
0  ???                            0x0 _RandomAccessFile.close (dart:io)
1  ???                            0x0 WalFileManager.saveWals + 66 (wal_file_manager.dart:66)
2  ???                            0x0 LocalWalSync._saveWalsToFile + 1517 (wals.dart:1517)
3  ???                            0x0 LocalWalSync._flush + 1512 (wals.dart:1512)
4  ???                            0x0 LocalWalSync.start.<fn> + 1345 (wals.dart:1345)