Inventory source host_filters fails

We’re upgrading an old AWX version 4.0 to the latest available at this moment 14.1.
This inventory source filter works in the old version but fails in the new AWX:
host_filters: [“{{ config.name != ‘host02’ }}”,“{{ config.name != ‘host03’ }}”,“{{ config.name != ‘host04’ }}”]

Receiving error below at the beginning of the sync process:

Traceback (most recent call last): File “/var/lib/awx/venv/awx/lib/python3.6/site-packages/awx/main/tasks.py”, line 1383, in run args = self.build_args(self.instance, private_data_dir, passwords) File “/var/lib/awx/venv/awx/lib/python3.6/site-packages/awx/main/tasks.py”, line 2594, in build_args args.append(self.pseudo_build_inventory(inventory_update, private_data_dir)) File “/var/lib/awx/venv/awx/lib/python3.6/site-packages/awx/main/tasks.py”, line 2619, in pseudo_build_inventory content = injector.inventory_contents(inventory_update, private_data_dir) File “/var/lib/awx/venv/awx/lib/python3.6/site-packages/awx/main/models/inventory.py”, line 1631, in inventory_contents self.inventory_as_dict(inventory_update, private_data_dir), File “/var/lib/awx/venv/awx/lib/python3.6/site-packages/awx/main/models/inventory.py”, line 2182, in inventory_as_dict for hf in host_filters.split(‘,’): AttributeError: ‘list’ object has no attribute ‘split’

How can I exclude multiple hosts in this filter?