X-Git-Url: https://git.openstreetmap.org/rails.git/blobdiff_plain/ec916b7429ec04731eb5c533c55915f627c9aa38..86b4d1bc2c05a68053c7485217144a7fcf8ef4e8:/app/models/relation.rb

diff --git a/app/models/relation.rb b/app/models/relation.rb
index b7cb0f15b..984732c71 100644
--- a/app/models/relation.rb
+++ b/app/models/relation.rb
@@ -224,6 +224,8 @@ class Relation < ActiveRecord::Base
   def update_from(new_relation, user)
     if !new_relation.preconditions_ok?
       raise OSM::APIPreconditionFailedError.new
+    elsif new_relation.version != version
+      raise OSM::APIVersionMismatchError.new(new_relation.version, version)
     else
       self.user_id = user.id
       self.tags = new_relation.tags