[WIP] PIM-3131: Sequential product edition

| Q                    | A
| -------------------- | ---
| Bug fix?             |
| New feature?         |
| BC breaks?           |
| CI currently passes? |
| Tests pass?          |
| Scenarios pass?      |
| Checkstyle issues?*  |
| PMD issues?**        |
| Changelog updated?   |
| Fixed tickets        |
| Doc PR               |
As there's a findByUser, I would suggest to name this method removeByUser. Remove from user sounds like we break the link from the user, but we don't remove the entities themselves.