diff --git a/app/services/footprint_service.rb b/app/services/footprint_service.rb
index db8b59fc0..21677f2b1 100644
--- a/app/services/footprint_service.rb
+++ b/app/services/footprint_service.rb
@@ -48,16 +48,20 @@ class FootprintService
       columns = FootprintService.footprint_columns(klass)
       current = FootprintService.footprint_data(klass, item, array: true)
       saved = FootprintDebug.find_by(footprint: item.footprint, klass: klass.name)
-      others = FootprintDebug.where('klass = ? AND data LIKE ? AND id != ?', klass, "#{item.id}%", saved.id)
-      puts "Debug footprint for #{klass} [ id: #{item.id} ]"
-      puts '-----------------------------------------'
-      puts "columns: [ #{columns.join(', ')} ]"
-      puts "current: #{current}"
-      puts "  saved: #{saved.format_data(item.id)}"
-      puts '-----------------------------------------'
-      puts "other possible matches IDs: #{others.map(&:id)}"
-      puts '-----------------------------------------'
-      item.footprint_children.map(&:debug_footprint)
+      if saved.nil?
+        puts "Debug data not found for #{klass} [ id: #{item.id} ]"
+      else
+        others = FootprintDebug.where('klass = ? AND data LIKE ? AND id != ?', klass, "#{item.id}%", saved.id)
+        puts "Debug footprint for #{klass} [ id: #{item.id} ]"
+        puts '-----------------------------------------'
+        puts "columns: [ #{columns.join(', ')} ]"
+        puts "current: #{current}"
+        puts "  saved: #{saved.format_data(item.id)}"
+        puts '-----------------------------------------'
+        puts "other possible matches IDs: #{others.map(&:id)}"
+        puts '-----------------------------------------'
+        item.footprint_children.map(&:debug_footprint)
+      end
     end
 
     private
diff --git a/lib/integrity/archive_helper.rb b/lib/integrity/archive_helper.rb
index 4b3e1b396..42695252a 100644
--- a/lib/integrity/archive_helper.rb
+++ b/lib/integrity/archive_helper.rb
@@ -15,7 +15,7 @@ class Integrity::ArchiveHelper
         Invoice.where('created_at > ?', last_period.end_at).order(:id).each do |i|
           next if i.check_footprint
 
-          puts i.debug_footprint
+          i.debug_footprint
           raise "Invalid footprint for invoice #{i.id}"
         end
       else
@@ -23,7 +23,7 @@ class Integrity::ArchiveHelper
         Invoice.order(:id).all.each do |i|
           next if i.check_footprint
 
-          puts i.debug_footprint
+          i.debug_footprint
           raise "Invalid footprint for invoice #{i.id}"
         end
       end