I was able to bypass this. You need to remove old value from .uasset file.
- Rename this property
- Load editor and open this asset
- Save this asset this would clean up value of property from .uasset binary file
a. If save button is inactive – change any existing property. Then save it. Revert value and save againg. - Rename UPROPERY back in C++
Now old value would be cleared from .uasset
and value would be loaded from .INI
file