Error 500 for a specific merge request search

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Steps to reproduce

• navigate to https://gitlab.com/gitlab-org/gitlab/-/merge_requests
• switch to Merged tab
• enter this will not match anything

or click https://gitlab.com/gitlab-org/gitlab/-/merge_requests?scope=all&search=this+will+not+match+anything&state=merged

What is the current bug behavior?

results in error 500:

Request ID: 01GWPE6XG4AH5BKN965V69QESH

What is the expected correct behavior?

if no merge requests match the criteria, display empty state: