ArgumentError: Unknown field name 'old_path' in initialization map entry.

https://sentry.gitlab.net/gitlab/gitlabcom/issues/1726728/?referrer=gitlab_plugin

ArgumentError: Unknown field name 'old_path' in initialization map entry.
  gitlab/diff/stats_cache.rb:21:in `initialize'
    stats = content.map { |stat| Gitaly::DiffStats.new(stat) }
  gitlab/diff/stats_cache.rb:21:in `new'
    stats = content.map { |stat| Gitaly::DiffStats.new(stat) }
  gitlab/diff/stats_cache.rb:21:in `block (2 levels) in read'
    stats = content.map { |stat| Gitaly::DiffStats.new(stat) }
  gitlab/diff/stats_cache.rb:21:in `map'
    stats = content.map { |stat| Gitaly::DiffStats.new(stat) }
  gitlab/diff/stats_cache.rb:21:in `block in read'
    stats = content.map { |stat| Gitaly::DiffStats.new(stat) }
...
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ArgumentError: Unknown field name 'old_path' in initialization map entry.