Subscription should have a content encoding in...

Problem/Motivation

We see the following issue:

Subscription should have a content encoding in Drupal\\Core\\Entity\\Sql\\SqlContentEntityStorage->save()

This bug was initially fixed here:

https://git.drupalcode.org/project/social_pwa/-/merge_requests/20/diffs#...

But this is not enough because users might have multiple subscriptions, so if the second or any subsequent subscription is broken the check will be valid, but the bug will still be there.

Steps to reproduce

I'm unsure how to create a broken subscription, so the root cause of this bug is still unknown.

Proposed resolution

For now, we can manipulate $user_data array and remove the fault item, but this is not solving the root cause of the issue.

Remaining tasks

User interface changes

API changes

Data model changes