Problem when updating Discourse Forum

I successfully installed the new version discourse. I just followed the instructions in the document above and i worked for me. But now I have trouble to restore from the backup.
I tried Restore a backup from the command line but i got following:

root@my_server:/var/www/discourse# discourse restore my_server-2023-06-20-033008-v20210922064213.tar.gz
Starting restore: my_server-2023-06-20-033008-v20210922064213.tar.gz
[STARTED]
'system' has started the restore!
Marking restore as running...
Making sure /var/www/discourse/tmp/restores/default/2023-06-29-113408 exists...
Copying archive to tmp directory...
Unzipping archive, this may take a while...
EXCEPTION: /var/www/discourse/lib/discourse.rb:137:in `exec': Failed to decompress archive.

gzip: stdin: not in gzip format
tar: Child returned status 1
tar: Error is not recoverable: exiting now
/var/www/discourse/lib/discourse.rb:171:in `execute_command'
/var/www/discourse/lib/discourse.rb:137:in `exec'
/var/www/discourse/lib/discourse.rb:33:in `execute_command'
/var/www/discourse/lib/backup_restore/backup_file_handler.rb:78:in `decompress_archive'
/var/www/discourse/lib/backup_restore/backup_file_handler.rb:23:in `decompress'
/var/www/discourse/lib/backup_restore/restorer.rb:42:in `run'
script/discourse:149:in `restore'
/var/www/discourse/vendor/bundle/ruby/3.2.0/gems/thor-1.2.2/lib/thor/command.rb:27:in `run'
/var/www/discourse/vendor/bundle/ruby/3.2.0/gems/thor-1.2.2/lib/thor/invocation.rb:127:in `invoke_command'
/var/www/discourse/vendor/bundle/ruby/3.2.0/gems/thor-1.2.2/lib/thor.rb:392:in `dispatch'
/var/www/discourse/vendor/bundle/ruby/3.2.0/gems/thor-1.2.2/lib/thor/base.rb:485:in `start'
script/discourse:290:in `<top (required)>'
/usr/local/lib/ruby/gems/3.2.0/gems/bundler-2.4.13/lib/bundler/cli/exec.rb:58:in `load'
/usr/local/lib/ruby/gems/3.2.0/gems/bundler-2.4.13/lib/bundler/cli/exec.rb:58:in `kernel_load'
/usr/local/lib/ruby/gems/3.2.0/gems/bundler-2.4.13/lib/bundler/cli/exec.rb:23:in `run'
/usr/local/lib/ruby/gems/3.2.0/gems/bundler-2.4.13/lib/bundler/cli.rb:492:in `exec'
/usr/local/lib/ruby/gems/3.2.0/gems/bundler-2.4.13/lib/bundler/vendor/thor/lib/thor/command.rb:27:in `run'
/usr/local/lib/ruby/gems/3.2.0/gems/bundler-2.4.13/lib/bundler/vendor/thor/lib/thor/invocation.rb:127:in `invoke_command'
/usr/local/lib/ruby/gems/3.2.0/gems/bundler-2.4.13/lib/bundler/vendor/thor/lib/thor.rb:392:in `dispatch'
/usr/local/lib/ruby/gems/3.2.0/gems/bundler-2.4.13/lib/bundler/cli.rb:34:in `dispatch'
/usr/local/lib/ruby/gems/3.2.0/gems/bundler-2.4.13/lib/bundler/vendor/thor/lib/thor/base.rb:485:in `start'
/usr/local/lib/ruby/gems/3.2.0/gems/bundler-2.4.13/lib/bundler/cli.rb:28:in `start'
/usr/local/lib/ruby/gems/3.2.0/gems/bundler-2.4.13/exe/bundle:45:in `block in <top (required)>'
/usr/local/lib/ruby/gems/3.2.0/gems/bundler-2.4.13/lib/bundler/friendly_errors.rb:117:in `with_friendly_errors'
/usr/local/lib/ruby/gems/3.2.0/gems/bundler-2.4.13/exe/bundle:33:in `<top (required)>'
/usr/local/bin/bundle:25:in `load'
/usr/local/bin/bundle:25:in `<main>'
Trying to rollback...
There was no need to rollback
Cleaning stuff up...
Removing tmp '/var/www/discourse/tmp/restores/default/2023-06-29-113408' directory...
Marking restore as finished...
Notifying 'system' of the end of the restore...
Finished!
[FAILED]
Restore done.

What should i do now?