FIX: all badges got revoked due to ensure consistency query

app/models/badge.rb

@@ -378,7 +378,7 @@ SQL
     DELETE FROM user_badges
     USING user_badges ub
     LEFT JOIN users u ON u.id = ub.user_id
-    WHERE u.id IS NULL
+    WHERE u.id IS NULL AND user_badges.id = ub.id
 SQL
 
     Badge.find_each(&:reset_grant_count!)

spec/models/badge_spec.rb

@@ -49,11 +49,12 @@ describe Badge do
     b.save
 
     UserBadge.create!(user_id: -100, badge_id: b.id, granted_at: 1.minute.ago, granted_by_id: -1)
+    UserBadge.create!(user_id: User.first.id, badge_id: b.id, granted_at: 1.minute.ago, granted_by_id: -1)
 
     Badge.ensure_consistency!
 
     b.reload
-    expect(b.grant_count).to eq(0)
+    expect(b.grant_count).to eq(1)
   end
 
 end