Fix exception with Cookies overflow

Summary

Fix error https://new-sentry.gitlab.net/organizations/gitlab/issues/89198/?project=9&referrer=project-issue-stream

These are caused by white hats or may be some bots as well but create unnecessary noise in Sentry.

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• I made sure there are no unverified deployments on staging in #version-gitlab-com Slack channel before merging this MR