i booted the poland version perfectly on galaxy a605g. as i told above i used csc bl and cp of my region which is of android oreo where as ap(system partitons are on ap files) of android pie from poland.The Poland version of Android 9.0 for Samsung Galaxy A6 Plus is the A605FN version. Next time check it clearly before posting wrong information to XDA forum users.
To be more specific it is the version A605FNXXU3BSC6 with Android 9.
It started to roll out in Poland which means that it is going to be available in every country until the end of April.
Little update: Successfully updated my A605FN Romania version to Android 9 A605FNXXU3BSC6 Poland version. Everything works just fine even the Samsung Account.
the only things are i can not set screen lock it dosent identify the password even if it is correct.
and samsung account dosent work...
fyi-a605g and a605fn both run on snapdragon 450..so this makes it possible to make the ap work perfectly....