This is a temporary fix for Lenovo Thinkbook 14-IML and 15-IML models.
This ACPI table override is intended to bring full functional operation to touchpad (multi-touch, two-finger scroll, etc.) in Linux.
Please refer to https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1853277 for details.
It is not needed anymore since Mar,02 2020 when BIOS update CJCN26WW was released.