How can I fix this error in stack_appodeal_flutter
E/Appodeal( 9569): Network [Error]: Your 'A4g' SDK version (21.0.0) doesn't match recommended. Please use 'A4g' SDK version 20.6.0 instead to be sure that everything will work correctly.
E/Appodeal( 9569): Network [Error]: Your 'Admob' SDK version (21.0.0) doesn't match recommended. Please use 'Admob' SDK version 20.6.0 instead to be sure that everything will work correctly.
E/Appodeal( 9569): Network [Error]: Your 'Notsy' SDK version (21.0.0) doesn't match recommended. Please use 'Notsy' SDK version 20.6.0 instead to be sure that everything will work correctly.