wangjialing218 opened a new pull request #9691:
URL: https://github.com/apache/pulsar/pull/9691
### Motivation
When force delete namespace, the partition topics to be deleted are list
twice and a exception will happen when delete the topic second time.

### Modifications
Correct the list of topics under the namespace to be delete.
### Verifying this change
This change is already covered by existing tests, such as
testForceDeleteNamespace()
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