Begin of the insertion**Steps**

1. Go to QA-edge work package list
2. Add *duplicate relations* to columns
3. Export list as PDF

**Stacktrace**

NoMethodError (undefined method `relations_of_type_duplicated' for #<WorkPackage:0x00000000083a84e8>):
lib/plugins/acts_as_customizable/lib/acts_as_customizable.rb:240:in `method_missing'
app/models/work_package/pdf_export/common.rb:39:in `field_value'
app/models/work_package/pdf_export/work_package_list_to_pdf.rb:171:in `make_field_value'
app/models/work_package/pdf_export/work_package_list_to_pdf.rb:166:in `make_column_value'
app/models/work_package/pdf_export/work_package_list_to_pdf.rb:136:in `block (2 levels) in data_rows'
app/models/work_package/pdf_export/work_package_list_to_pdf.rb:135:in `map'
app/models/work_package/pdf_export/work_package_list_to_pdf.rb:135:in `block in data_rows'
app/models/work_package/pdf_export/work_package_list_to_pdf.rb:134:in `flat_map'
app/models/work_package/pdf_export/work_package_list_to_pdf.rb:134:in `data_rows'
app/models/work_package/pdf_export/work_package_list_to_pdf.rb:122:in `data'
app/models/work_package/pdf_export/work_package_list_to_pdf.rb:96:in `write_work_packages!'
app/models/work_package/pdf_export/work_package_list_to_pdf.rb:50:in `render!'
app/models/work_package/exporter/pdf.rb:37:in `list'
app/models/work_package/exporter/base.rb:41:in `list'
app/controllers/work_packages_controller.rb:93:in `export_list'End of the insertion