[3.4] fix runtime error: comparing uncomparable type

[ktalg]

Backport of #18893

[k8s-ci-robot]

Hi @ktalg. Thanks for your PR.

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[ahrtr]

/ok-to-test

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ahrtr, ktalg

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