fix topics=null

[ylsGit]

• Targeted PR against correct branch (see CONTRIBUTING.md)

• Linked to github-issue with discussion and accepted design OR link to spec that describes this work.

• Wrote tests

• Updated relevant documentation (docs/)

• Added a relevant changelog entry to the Unreleased section in CHANGELOG.md

• Reviewed Files changed in the github PR explorer

---

For Admin Use:

• Added appropriate labels to PR (ex. wip, ready-for-review, docs)
• Reviewers Assigned
• Squashed all commits, uses message "Merge PR #XYZ: [title]" (coding standards)

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (dev@12e5bde). Click here to learn what that means.
The diff coverage is n/a.

❗ Current head 913c5d2 differs from pull request most recent head fb7c2ac. Consider uploading reports for the commit fb7c2ac to get more accurate results

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@@          Coverage Diff           @@
##             dev     #102   +/-   ##
======================================
  Coverage       ?   30.82%           
======================================
  Files          ?       52           
  Lines          ?     5453           
  Branches       ?        0           
======================================
  Hits           ?     1681           
  Misses         ?     3604           
  Partials       ?      168           

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