d4677353b8
Revert "Optimistic locking for Issue and Merge Requests"
The migration to add `lock_version` in !5146 to every issue and merge request takes too long on GitLab.com since it has to add a default value of 0 to every row. Unfortunately, Rails 4.2 doesn't work properly if the value is left as `nil`; anything using optimistic locking cannot be edited.
This bug was fixed in Rails 5.0 via this commit:
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admin | ||
dashboard | ||
explore | ||
group | ||
profile | ||
project | ||
snippets | ||
steps | ||
support | ||
abuse_report.feature | ||
groups.feature | ||
invites.feature | ||
search.feature | ||
snippet_search.feature | ||
user.feature |