Want to replace 8k Height map with 2k map. Is it possible to resize the map as it was?

For instance I want to lower the resolution of the height map from 8k to 2k. When I imported the lower res. one, of course it’s stretched now. So would it be possible to scale 2k map to 8k map size now? I have multiple things done on 8K map like: foliage, landscape painting, mesh assets placed, lighting, etc. etc.

Would be really grateful if someone could explain the proper way to do it.