AttributeError: It is ambiguous to get upstream_tag_template: there is more than one package in the config.

[sentry-io]

Sentry Issue: PCKT-002-PACKIT-SERVICE-8K8

AttributeError: It is ambiguous to get upstream_tag_template: there is more than one package in the config.
(8 additional frame(s) were not displayed)
...
  File "packit_service/worker/jobs.py", line 513, in create_tasks
    if self.should_task_be_created_for_job_config_and_handler(
  File "packit_service/worker/jobs.py", line 577, in should_task_be_created_for_job_config_and_handler
    event=self.event.get_dict(),
  File "packit_service/worker/events/new_hotness.py", line 159, in get_dict
    d["tag_name"] = self.tag_name
  File "packit_service/worker/events/new_hotness.py", line 151, in tag_name
    if not (self.packages_config and self.packages_config.upstream_tag_template):
  File "packit/config/common_package_config.py", line 571, in __getattr__
    raise AttributeError(

This is preventing pull_from_upstream for specfile both on prod and on stg.

[lbarcziova]

This looks like the same/similar as #2172

[nforro]

It can probably be solved in a similar way: packit/packit@e4ae0a4