direct assignment bug

2022-08-16T17:38:30.0331060Z ==================================== ERRORS ====================================
2022-08-16T17:38:30.0331819Z _ ERROR at setup of TestPreprintUpdateLicense.test_admin_update_license_with_invalid_id _
2022-08-16T17:38:30.0332499Z api_tests/preprints/views/test_preprint_detail.py:1203: in preprint_provider
2022-08-16T17:38:30.0382710Z     preprint_provider.licenses_acceptable = [cc0_license, no_license]
2022-08-16T17:38:30.0383541Z /opt/hostedtoolcache/Python/3.6.15/x64/lib/python3.6/site-packages/django/db/models/fields/related_descriptors.py:547: in __set__
2022-08-16T17:38:30.0383947Z     % self._get_set_deprecation_msg_params(),
2022-08-16T17:38:30.0384510Z E   TypeError: Direct assignment to the forward side of a many-to-many set is prohibited. Use licenses_acceptable.set() instead.
2022-08-16T17:38:30.0384974Z __ ERROR at setup of TestPreprintUpdateLicense.test_admin_can_update_license ___
2022-08-16T17:38:30.0385384Z api_tests/preprints/views/test_preprint_detail.py:1203: in preprint_provider
2022-08-16T17:38:30.0385761Z     preprint_provider.licenses_acceptable = [cc0_license, no_license]
2022-08-16T17:38:30.0386351Z /opt/hostedtoolcache/Python/3.6.15/x64/lib/python3.6/site-packages/django/db/models/fields/related_descriptors.py:547: in __set__
2022-08-16T17:38:30.0386749Z     % self._get_set_deprecation_msg_params(),
2022-08-16T17:38:30.0387304Z E   TypeError: Direct assignment to the forward side of a many-to-many set is prohibited. Use licenses_acceptable.set() instead.
2022-08-16T17:38:30.0387767Z _ ERROR at setup of TestPreprintUpdateLicense.test_admin_can_update_license_record _
2022-08-16T17:38:30.0388180Z api_tests/preprints/views/test_preprint_detail.py:1203: in preprint_provider
2022-08-16T17:38:30.0388561Z     preprint_provider.licenses_acceptable = [cc0_license, no_license]
2022-08-16T17:38:30.0389142Z /opt/hostedtoolcache/Python/3.6.15/x64/lib/python3.6/site-packages/django/db/models/fields/related_descriptors.py:547: in __set__
2022-08-16T17:38:30.0389534Z     % self._get_set_deprecation_msg_params(),
2022-08-16T17:38:30.0390070Z E   TypeError: Direct assignment to the forward side of a many-to-many set is prohibited. Use licenses_acceptable.set() instead.
2022-08-16T17:38:30.0390540Z ____ ERROR at setup of TestPreprintUpdateLicense.test_cannot_update_license ____
2022-08-16T17:38:30.0390935Z api_tests/preprints/views/test_preprint_detail.py:1203: in preprint_provider
2022-08-16T17:38:30.0391308Z     preprint_provider.licenses_acceptable = [cc0_license, no_license]
2022-08-16T17:38:30.0391885Z /opt/hostedtoolcache/Python/3.6.15/x64/lib/python3.6/site-packages/django/db/models/fields/related_descriptors.py:547: in __set__
2022-08-16T17:38:30.0392278Z     % self._get_set_deprecation_msg_params(),
2022-08-16T17:38:30.0392824Z E   TypeError: Direct assignment to the forward side of a many-to-many set is prohibited. Use licenses_acceptable.set() instead.
2022-08-16T17:38:30.0393286Z ________ ERROR at setup of TestPreprintUpdateLicense.test_update_error _________
2022-08-16T17:38:30.0393683Z api_tests/preprints/views/test_preprint_detail.py:1203: in preprint_provider
2022-08-16T17:38:30.0394046Z     preprint_provider.licenses_acceptable = [cc0_license, no_license]
2022-08-16T17:38:30.0394627Z /opt/hostedtoolcache/Python/3.6.15/x64/lib/python3.6/site-packages/django/db/models/fields/related_descriptors.py:547: in __set__
2022-08-16T17:38:30.0395020Z     % self._get_set_deprecation_msg_params(),
2022-08-16T17:38:30.0395559Z E   TypeError: Direct assignment to the forward side of a many-to-many set is prohibited. Use licenses_acceptable.set() instead.
2022-08-16T17:38:30.0396077Z _ ERROR at setup of TestPreprintUpdateLicense.test_update_preprint_with_existing_license_year_attribute_only _
2022-08-16T17:38:30.0396721Z api_tests/preprints/views/test_preprint_detail.py:1203: in preprint_provider
2022-08-16T17:38:30.0397090Z     preprint_provider.licenses_acceptable = [cc0_license, no_license]
2022-08-16T17:38:30.0397679Z /opt/hostedtoolcache/Python/3.6.15/x64/lib/python3.6/site-packages/django/db/models/fields/related_descriptors.py:547: in __set__
2022-08-16T17:38:30.0398076Z     % self._get_set_deprecation_msg_params(),
2022-08-16T17:38:30.0398612Z E   TypeError: Direct assignment to the forward side of a many-to-many set is prohibited. Use licenses_acceptable.set() instead.
2022-08-16T17:38:30.0399227Z _ ERROR at setup of TestPreprintUpdateLicense.test_update_preprint_with_existing_license_copyright_holders_attribute_only _
2022-08-16T17:38:30.0399688Z api_tests/preprints/views/test_preprint_detail.py:1203: in preprint_provider
2022-08-16T17:38:30.0400063Z     preprint_provider.licenses_acceptable = [cc0_license, no_license]
2022-08-16T17:38:30.0400637Z /opt/hostedtoolcache/Python/3.6.15/x64/lib/python3.6/site-packages/django/db/models/fields/related_descriptors.py:547: in __set__
2022-08-16T17:38:30.0401027Z     % self._get_set_deprecation_msg_params(),
2022-08-16T17:38:30.0401564Z E   TypeError: Direct assignment to the forward side of a many-to-many set is prohibited. Use licenses_acceptable.set() instead.
2022-08-16T17:38:30.0402077Z _ ERROR at setup of TestPreprintUpdateLicense.test_update_preprint_with_existing_license_relationship_only _
2022-08-16T17:38:30.0402521Z api_tests/preprints/views/test_preprint_detail.py:1203: in preprint_provider
2022-08-16T17:38:30.0402893Z     preprint_provider.licenses_acceptable = [cc0_license, no_license]
2022-08-16T17:38:30.0403475Z /opt/hostedtoolcache/Python/3.6.15/x64/lib/python3.6/site-packages/django/db/models/fields/related_descriptors.py:547: in __set__
2022-08-16T17:38:30.0403857Z     % self._get_set_deprecation_msg_params(),
2022-08-16T17:38:30.0404393Z E   TypeError: Direct assignment to the forward side of a many-to-many set is prohibited. Use licenses_acceptable.set() instead.
2022-08-16T17:38:30.0405078Z _ ERROR at setup of TestPreprintUpdateLicense.test_update_preprint_with_existing_license_relationship_and_attributes _
2022-08-16T17:38:30.0405537Z api_tests/preprints/views/test_preprint_detail.py:1203: in preprint_provider
2022-08-16T17:38:30.0405909Z     preprint_provider.licenses_acceptable = [cc0_license, no_license]
2022-08-16T17:38:30.0406560Z /opt/hostedtoolcache/Python/3.6.15/x64/lib/python3.6/site-packages/django/db/models/fields/related_descriptors.py:547: in __set__
2022-08-16T17:38:30.0406955Z     % self._get_set_deprecation_msg_params(),
2022-08-16T17:38:30.0407485Z E   TypeError: Direct assignment to the forward side of a many-to-many set is prohibited. Use licenses_acceptable.set() instead.
2022-08-16T17:38:30.0407992Z _ ERROR at setup of TestPreprintUpdateLicense.test_update_preprint_license_does_not_change_project_license _
2022-08-16T17:38:30.0408437Z api_tests/preprints/views/test_preprint_detail.py:1203: in preprint_provider
2022-08-16T17:38:30.0408811Z     preprint_provider.licenses_acceptable = [cc0_license, no_license]
2022-08-16T17:38:30.0409391Z /opt/hostedtoolcache/Python/3.6.15/x64/lib/python3.6/site-packages/django/db/models/fields/related_descriptors.py:547: in __set__
2022-08-16T17:38:30.0409779Z     % self._get_set_deprecation_msg_params(),
2022-08-16T17:38:30.0410306Z E   TypeError: Direct assignment to the forward side of a many-to-many set is prohibited. Use licenses_acceptable.set() instead.
2022-08-16T17:38:30.0410811Z _ ERROR at setup of TestPreprintUpdateLicense.test_update_preprint_license_without_change_does_not_add_log _
2022-08-16T17:38:30.0411263Z api_tests/preprints/views/test_preprint_detail.py:1203: in preprint_provider
2022-08-16T17:38:30.0411637Z     preprint_provider.licenses_acceptable = [cc0_license, no_license]
2022-08-16T17:38:30.0412215Z /opt/hostedtoolcache/Python/3.6.15/x64/lib/python3.6/site-packages/django/db/models/fields/related_descriptors.py:547: in __set__
2022-08-16T17:38:30.0412686Z     % self._get_set_deprecation_msg_params(),
2022-08-16T17:38:30.0413235Z E   TypeError: Direct assignment to the forward side of a many-to-many set is prohibited. Use licenses_acceptable.set() instead.