If you don't use Conditional Fields (old version) for Elementor Pro Form but is activated
If you don't use conditional fields(old version), then It is recommended to disable it from Dynamic Content for Elementor > Features > Legacy
If you use Conditional Fields (old version) for Elementor Pro Form
If you use Conditional Fields (old version), it is recommended to switch to Conditional Fields for Elementor Pro Form
Activate Conditional Fields for Elementor Pro Form from Features;
Create the new conditions because you can't move the old conditions to the new version;
You can use a conditions generator as well;
Now Deactivate the Conditional Fields (old version).