Using high quality pixel filtering with AI denoising or upscaling is not supported.

This error message appears under the following conditions:

1. "High Quality" image filter type is set in Render Setup > System > Frame Buffer > Image filter
2. AI denoising (either the NVIDIA or the Intel AI denoiser) is enabled in Render Setup > Scene > General Settings > Denoising

or

1. "High Quality" image filter type is set in Render Setup > System > Frame Buffer > Image filter
2. Upscaling is enabled in Render Setup > Scene > Production Upscaling

Currently, AI denoising and upscaling cannot be used with High Quality pixel filtering due to technical limitations. The pop-up message provides an option to disable the high-quality pixel filtering option (and keep the currently selected AI denoising or upscaling active).

This means that to use high-quality filtering, AI denoising and upscaling need to be disabled manually.

Note: The Corona High Quality denoiser can be used with high-quality filtering without any limitations!

See also: 

• What is high-quality image filtering? 
• How to use denoising?