Fix 500 error for old (somewhat) MRs

What does this MR do?

Fix #36540 (closed)

Are there points in the code the reviewer needs to double check?

There are no additional tests, do I need to write something?

Why was this MR needed?

Because it'll fix an error.

Screenshots (if relevant)

Just regular 500 error.

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• API support added
• Tests added for this feature/bug
• Review
  • Has been reviewed by UX
  • Has been reviewed by Frontend
  • Has been reviewed by Backend
  • Has been reviewed by Database
• Conform by the merge request performance guides
• Conform by the style guides
• Squashed related commits together

What are the relevant issue numbers?