Iphone backup password
Hello. 2 days ago I made a backup of my iphone while trading in old iphone Xr in iStore (Honolulu, on vacation). It was first time using that computer or any macbook as backup. we definitely did not set any password, because we were not asked to by system. I wanted to restore the backup on new iphone and I am not able to do so, bevause I am asked a passord I dont know, because I had not set any! I have lot of stuff in that backup for my work that I need and I dont have the old iphone anymore. Can you help me? I tried various old passwords, incl 0000, 1234 etc… is there really a bug in apple systems which causes this? Any help?