Here is the for your situation:
This specific patch is highly recommended for users experiencing application crashes when changing symbology. This issue was caused by a conflict between ArcGIS Pro 2.8/2.9 and certain Microsoft .NET 4.8.x arcgis pro 29 patch 5 295 link
Alternatively, if you are currently running a version of ArcGIS Pro 2.9.x, you can check for updates directly within the application under the section of the Project tab. Why This Patch Was Necessary Here is the for your situation: This specific
The release of on October 20, 2022, serves as a vital maintenance update for GIS professionals who remain on the 2.x software cycle. This cumulative patch is designed to resolve significant stability and display issues, ensuring that legacy workflows continue to run smoothly even as operating systems evolve. Why You Need ArcGIS Pro 2.9.5 This cumulative patch is designed to resolve significant
represents the fifth and likely one of the final cumulative patches for the ArcGIS Pro 2.9 release branch. Released in late 2022/early 2023, this patch focuses on stability, security updates, and addressing critical bugs identified in previous iterations. For organizations maintaining enterprise stability on the 2.x branch before migrating to the 3.x architecture, 2.9.5 is a critical maintenance update.