Project: QGIS
Version: 3.16
Multiple relation widgets may now be created for a single relation, each with their own distinct configuration.
This feature changes the behavior of relation widgets created in the drag and drop interface and provides resolution for Issue 37675.
On reading a project configured with older QGIS versions, the config is taken over and written into the new widget configuration. Autogenerated forms no longer allow the configuration of relation editor widgets anymore, but if it has been configured in an older QGIS, the attribute form will still read this configuration.
This feature was developed by signedav