reset iTunes backup password?

See also Disable iOS backup encryption - Apple Community. In particular:

If you have forgotten the password, or were not aware that encryption had been enabled, consider that it might be any computer, Apple ID, Wi-Fi password or device PIN that you've used in the past, working from the assumption that you might have reused a common password that you were using when encryption was first activated. See About encrypted backups on your iPhone, iPad, or iPod touch - Apple Support for details.

tt2

atta63 wrote:

Hello, my problem was not solved

How can I reset iTunes backup password?

If you can’t remember the password for your encrypted backup - Apple Support