diff --git a/app/services/invoices/number_service.rb b/app/services/invoices/number_service.rb
index 63875cb1a..f247fe1e4 100644
--- a/app/services/invoices/number_service.rb
+++ b/app/services/invoices/number_service.rb
@@ -18,12 +18,24 @@ class Invoices::NumberService
       saved_number = setting == 'invoice_reference' ? document.reference : document.order_number
       return nil if saved_number.nil?
 
-      pattern = pattern(document, setting)
-      pattern = PaymentDocumentService.send(:replace_document_type_pattern, document, pattern)
-      start_idx = pattern.index(/n+|y+|m+|d+/)
-      end_idx = pattern.rindex(/n+|y+|m+|d+/)
+      indices = number_indices(document, setting)
+      saved_number[indices[0]..indices[1]]&.to_i
+    end
 
-      saved_number[start_idx..end_idx]&.to_i
+    # Replace the number of the reference of the given document and return the new reference
+    # @param document [PaymentDocument,NilClass]
+    # @param setting [String] 'invoice_reference' | 'invoice_order-nb'
+    # @return [String,NilClass]
+    def change_number(document, new_number, setting = 'invoice_reference')
+      raise TypeError, "invalid setting #{setting}" unless %w[invoice_order-nb invoice_reference].include?(setting)
+      return nil if document.nil?
+
+      saved_number = setting == 'invoice_reference' ? document.reference : document.order_number
+      return nil if saved_number.nil?
+
+      indices = number_indices(document, setting)
+      saved_number[indices[0]..indices[1]] = pad_and_truncate(new_number, indices[1] - indices[0])
+      saved_number
     end
 
     # @param document [PaymentDocument,NilClass]
@@ -58,5 +70,30 @@ class Invoices::NumberService
                  Setting.get(setting)
                end
     end
+
+    private
+
+    # Output the given integer with leading zeros. If the given value is longer than the given
+    # length, it will be truncated.
+    # @param value [Integer] the integer to pad
+    # @param length [Integer] the length of the resulting string.
+    def pad_and_truncate(value, length)
+      value.to_s.rjust(length, '0').gsub(/^.*(.{#{length},}?)$/m, '\1')
+    end
+
+    # Return the indices of the number in the document's reference
+    # @param document [PaymentDocument,NilClass]
+    # @param setting [String] 'invoice_reference' | 'invoice_order-nb'
+    # @return [Array<Integer>]
+    def number_indices(document, setting = 'invoice_reference')
+      raise TypeError, "invalid setting #{setting}" unless %w[invoice_order-nb invoice_reference].include?(setting)
+      return nil if document.nil?
+
+      pattern = pattern(document, setting)
+      pattern = PaymentDocumentService.send(:replace_document_type_pattern, document, pattern)
+      start_idx = pattern.index(/n+|y+|m+|d+/)
+      end_idx = pattern.rindex(/n+|y+|m+|d+/)
+      [start_idx, end_idx]
+    end
   end
 end
diff --git a/lib/tasks/fablab/fix_references.rake b/lib/tasks/fablab/fix_references.rake
new file mode 100644
index 000000000..77240ffa9
--- /dev/null
+++ b/lib/tasks/fablab/fix_references.rake
@@ -0,0 +1,69 @@
+# frozen_string_literal: true
+
+require 'integrity/archive_helper'
+
+namespace :fablab do
+  desc 'Fill the holes in the logical sequence of invoices references and regenerate invoices w/ duplicate reference'
+  task fix_references: :environment do |_task, _args|
+    include ActionView::Helpers::NumberHelper
+
+    user = User.adminsys || User.admins.first
+
+    # check the footprints
+    Integrity::ArchiveHelper.check_footprints
+    ActiveRecord::Base.transaction do
+      missing_references = {}
+
+      # browse invoices to list missing reference
+      not_closed(Invoice).order(created_at: :desc).each do |invoice|
+        number = Invoices::NumberService.number(invoice)
+        next if number == 1
+
+        previous = Invoices::NumberService.change_number(invoice, number - 1)
+        next unless Invoice.find_by(reference: previous).nil?
+
+        missing_references[invoice.created_at] ||= []
+        missing_references[invoice.created_at].push(previous)
+      end
+
+      # create placeholder invoices for found missing references
+      missing_references.each_pair do |date, references|
+        references.reverse_each.with_index do |reference, index|
+          Invoice.create!(
+            total: 0,
+            invoicing_profile: user.invoicing_profile,
+            statistic_profile: user.statistic_profile,
+            operator_profile: user.invoicing_profile,
+            payment_method: '',
+            reference: reference,
+            created_at: date - (index + 1).seconds,
+            description: 'Facture à néant, saut de facturation suite à un dysfonctionnement du logiciel Fab Manager',
+            invoice_items_attributes: [{
+              amount: 0,
+              description: 'facture à zéro',
+              object_type: 'Error',
+              object_id: 1,
+              main: true
+            }]
+          )
+        end
+      end
+
+      # chain records
+      puts 'Chaining all record. This may take a while...'
+      not_closed(InvoiceItem).order(:id).find_each(&:chain_record)
+      not_closed(Invoice).order(:id).find_each(&:chain_record)
+    end
+  end
+
+  # @param klass [Class]
+  # @return [ActiveRecord::Relation<klass>,Class]
+  def not_closed(klass)
+    if AccountingPeriod.count.positive?
+      last_period = AccountingPeriod.order(start_at: :desc).first
+      klass.where('created_at > ?', last_period.end_at)
+    else
+      klass
+    end
+  end
+end
diff --git a/test/helpers/invoice_helper.rb b/test/helpers/invoice_helper.rb
index d63ed0f9b..37fb32ae1 100644
--- a/test/helpers/invoice_helper.rb
+++ b/test/helpers/invoice_helper.rb
@@ -42,6 +42,7 @@ module InvoiceHelper
     )
     reservation.save
     invoice = Invoice.new(
+      total: 1000,
       invoicing_profile: customer.invoicing_profile,
       statistic_profile: customer.statistic_profile,
       operator_profile: operator.invoicing_profile,