Odoo Open Source Editing

[cherab-hub]

i am using on-premise but whenever i change some code based on my preference only one time changes happen but again it gets changed to its original source how can it be a open source if i can't based on my industry preference ..

[Autocolca]

Traceback (most recent call last):
File "/home/odoo/src/odoo/odoo/http.py", line 1849, in _serve_db
return service_model.retrying(self._serve_ir_http, self.env)
File "/home/odoo/src/odoo/odoo/service/model.py", line 153, in retrying
result = func()
File "/home/odoo/src/odoo/odoo/http.py", line 1877, in _serve_ir_http
response = self.dispatcher.dispatch(rule.endpoint, args)
File "/home/odoo/src/odoo/odoo/http.py", line 1991, in dispatch
return self.request.registry['ir.http']._dispatch(endpoint)
File "/home/odoo/src/odoo/addons/website/models/ir_http.py", line 237, in _dispatch
response = super()._dispatch(endpoint)
File "/home/odoo/src/odoo/odoo/addons/base/models/ir_http.py", line 154, in _dispatch
result = endpoint(**request.params)
File "/home/odoo/src/odoo/odoo/http.py", line 763, in route_wrapper
result = endpoint(self, *args, **params_ok)
File "/home/odoo/src/user/custom_event/controllers/portal_boletos.py", line 76, in download_multiple_boletos
return self._show_report(model=boletos, report_type='pdf', report_ref='event.event_registration_report_template_full_page_ticket', download=False)
File "/home/odoo/src/odoo/addons/portal/controllers/portal.py", line 485, in _show_report
report = getattr(ReportAction, method_name)(report_ref, list(model.ids), data={'report_type': report_type})[0]
File "/home/odoo/src/odoo/addons/account/models/ir_actions_report.py", line 58, in _render_qweb_pdf
if self._is_invoice_report(report_ref):
File "/home/odoo/src/odoo/addons/account_edi_ubl_cii/models/ir_actions_report.py", line 22, in _is_invoice_report
return super()._is_invoice_report(report_ref) or self._get_report(report_ref).report_name in custom_templates
File "/home/odoo/src/odoo/addons/account/models/ir_actions_report.py", line 53, in _is_invoice_report
return self._get_report(report_ref).report_name in ('account.report_invoice_with_payments', 'account.report_invoice')
File "/home/odoo/src/odoo/odoo/addons/base/models/ir_actions_report.py", line 558, in _get_report
raise ValueError("Fetching report %r: type %s, expected ir.actions.report" % (report_ref, report._name))
ValueError: Fetching report 'event.event_registration_report_template_full_page_ticket': type ir.ui.view, expected ir.actions.report