In the coming weeks, there’d be some significant additions and improvements related to the image coaddition part of the DRP pipeline as we march towards producing cell-based coadds. Most of them are expected to be transparent to end users, and I plan on using this topic to post the updates as they happen.
With DM-44623 merged, coadds (deepCoadd) built with w_2024_26 or later from warps (deepCoadd_directWarp and deepCoadd_psfMatchedWarp) generated with Science Pipelines version w_2024_25 or earlier would result in a coadd PSF that would be different and less accurate. Normally, running pipetask run prohibits mixing data products produced with different versions unless --no-versions flag is used. Thus, this is not a limitation unless you run parts of the pipeline for testing purposes. Note that reading the warps from earlier versions is still fully supported.