Files not compatible with older versions (after update to 22.4.1)
after updating to 22.4 / 22.4.1 and slightly modifying (just changing layer positions and saving) some of our old .psd and .pdf files created with 22.0 version, they are suddenly not compatible with any older versions of photoshop. When trying to open it with an older version (22.0) this error shows: This document contains unknown data which will be discarded to keep layers editable. To preserve the original appearance instead, choose Flatten to load composite data as flattened image.
Is there any way to solve this without creating new files or downgrading? Could it be fixed in a new version? We have a lot of such files, they have smart objects (without filters, styles..) and a lot of data sets and all of them suddenly stop working for older versions. We tried deleting layer by layer to find our which ones are creating problems. The ones we found problematic are:
1. all smart layers/objects
2. a group of rectangular shapes with an fx of stroke + color overlay
3. Three pixel variables.