diff --git a/lib/reporting/reports/enterprise_fee_summary/base.rb b/lib/reporting/reports/enterprise_fee_summary/base.rb
index 837c84df7d..ccbef3d323 100644
--- a/lib/reporting/reports/enterprise_fee_summary/base.rb
+++ b/lib/reporting/reports/enterprise_fee_summary/base.rb
@@ -8,7 +8,8 @@ module Reporting
 
         def initialize(user, params = {}, render: false)
           super(user, params, render: render)
-          p = params[:q]
+          # Clone hash before modifying it:
+          p = params[:q].clone
           if p.present?
             p['start_at'] = p.delete('completed_at_gt')
             p['end_at'] = p.delete('completed_at_lt')
diff --git a/spec/lib/reports/enterprise_fee_summary/enterprise_fee_summary_report_spec.rb b/spec/lib/reports/enterprise_fee_summary/enterprise_fee_summary_report_spec.rb
index 6ea086c7dd..f9ce422d39 100644
--- a/spec/lib/reports/enterprise_fee_summary/enterprise_fee_summary_report_spec.rb
+++ b/spec/lib/reports/enterprise_fee_summary/enterprise_fee_summary_report_spec.rb
@@ -99,6 +99,12 @@ describe Reporting::Reports::EnterpriseFeeSummary::Base do
     let!(:second_customer_order) { prepare_order(customer: customer) }
     let!(:other_customer_order) { prepare_order(customer: another_customer) }
 
+    it "doesn't delete params" do
+      params = ActionController::Parameters.new("completed_at_gt" => "2023-02-08+00:00")
+      described_class.new(current_user, params)
+      expect(params["completed_at_gt"]).to eq "2023-02-08+00:00"
+    end
+
     it "groups and sorts entries correctly" do
       totals = subject.query_result