# How to keep UPROPERTIES changed through C++ in a Level Actor Instance Persistent between Editor Sessions? **URL:** \ **Category:** C++\ **Tags:** unreal-engine, level, editor, question, CPP\ **Created:** [March 5, 2024, 1:46am UTC](https://forums.unrealengine.com/t/how-to-keep-uproperties-changed-through-c-in-a-level-actor-instance-persistent-between-editor-sessions/1730821 "2024-03-05T01:46:10Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![IrSoil](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@IrSoil](https://forums.unrealengine.com/u/IrSoil)\ **Post date:** [March 5, 2024, 8:07am UTC](https://forums.unrealengine.com/t/how-to-keep-uproperties-changed-through-c-in-a-level-actor-instance-persistent-between-editor-sessions/1730821/2 "2024-03-05T08:07:48Z")
I don’t know the proper solution on this, but i solved it via `Editor Utility Widget` where on button click i’m: - getting all relevant actors; - set them guids if there is none; - [mark all the relevant blueprints dirty](https://forums.unrealengine.com/t/editor-utility-widget-how-to-save-changes-solved/821338/2) so that editor could see changes were made - manually call “save all” (ctrl+shift+s) Not 100% automated, but this solves the problem for me for now. I did try to do it “properly”, but there was so much problems that it isn’t worth further research for me. fyi the problems to consider: - guids regenerating each time object is moved; - guids not regenerating on actor duplication (like alt+move); - guids regenerating on each blueprint compilation. upd: a year later: Turns out there is an `UObject::PostEditImport()` function that got called whenever you need: on placing\dropping actor into the level, on duplication, on copy-pasting… so it seems it’s a way to solve the original problem --- _[View the full topic](https://forums.unrealengine.com/t/how-to-keep-uproperties-changed-through-c-in-a-level-actor-instance-persistent-between-editor-sessions/1730821)._