diff --git a/app/models/issue.rb b/app/models/issue.rb
--- a/app/models/issue.rb
+++ b/app/models/issue.rb
@@ -88,36 +88,37 @@
   def move_to(new_project, new_tracker = nil, options = {})
     options ||= {}
     issue = options[:copy] ? self.clone : self
-    transaction do
-      if new_project && issue.project_id != new_project.id
-        # delete issue relations
-        unless Setting.cross_project_issue_relations?
-          issue.relations_from.clear
-          issue.relations_to.clear
+    begin
+      transaction do
+        if new_project && issue.project_id != new_project.id
+          # delete issue relations
+          unless Setting.cross_project_issue_relations?
+            issue.relations_from.clear
+            issue.relations_to.clear
+          end
+          # issue is moved to another project
+          # reassign to the category with same name if any
+          new_category = issue.category.nil? ? nil : new_project.issue_categories.find_by_name(issue.category.name)
+          issue.category = new_category
+          issue.fixed_version = nil
+          issue.project = new_project
         end
-        # issue is moved to another project
-        # reassign to the category with same name if any
-        new_category = issue.category.nil? ? nil : new_project.issue_categories.find_by_name(issue.category.name)
-        issue.category = new_category
-        issue.fixed_version = nil
-        issue.project = new_project
-      end
-      if new_tracker
-        issue.tracker = new_tracker
-      end
-      if options[:copy]
-        issue.custom_field_values = self.custom_field_values.inject({}) {|h,v| h[v.custom_field_id] = v.value; h}
-        issue.status = self.status
-      end
-      if issue.save
+        if new_tracker
+          issue.tracker = new_tracker
+        end
+        if options[:copy]
+          issue.custom_field_values = self.custom_field_values.inject({}) {|h,v| h[v.custom_field_id] = v.value; h}
+          issue.status = self.status
+        end
+        issue.save!
         unless options[:copy]
           # Manually update project_id on related time entries
           TimeEntry.update_all("project_id = #{new_project.id}", {:issue_id => id})
         end
-      else
-        Issue.connection.rollback_db_transaction
-        return false
       end
+    rescue ActiveRecord::RecordInvalid
+      #   #Issue.connection.rollback_db_transaction
+      return false
     end
     return issue
   end
@@ -143,9 +144,7 @@
     if start_date && soonest_start && start_date < soonest_start
       errors.add :start_date, :invalid
     end
-  end
-  
-  def validate_on_create
+ 
     errors.add :tracker_id, :invalid unless project.trackers.include?(tracker)
   end
   
diff --git a/test/unit/issue_test.rb b/test/unit/issue_test.rb
--- a/test/unit/issue_test.rb
+++ b/test/unit/issue_test.rb
@@ -136,7 +136,7 @@
     assert_equal orig.tracker, issue.tracker
     assert_equal orig.custom_values.first.value, issue.custom_values.first.value
   end
-  
+
   def test_should_close_duplicates
     # Create 3 issues
     issue1 = Issue.new(:project_id => 1, :tracker_id => 1, :author_id => 1, :status_id => 1, :priority => IssuePriority.all.first, :subject => 'Duplicates test', :description => 'Duplicates test')
@@ -228,6 +228,14 @@
     assert_nil copy.custom_value_for(2)
   end
   
+  def test_copy_to_another_project_with_disabled_tracker
+    assert !Project.find(3).trackers.include?(Tracker.find(1))
+    issue = Issue.find(1)
+    assert_equal 1, issue.tracker_id
+    assert !issue.move_to(Project.find(3), nil, :copy => true)
+  end
+
+
   def test_issue_destroy
     Issue.find(1).destroy
     assert_nil Issue.find_by_id(1)