UE5 Landscape material painting is not working

Development World Creation
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8

End after reload the map it looks like this:

Zrzut ekranu 2024-12-06 144646
Zrzut ekranu 2024-12-06 1446461229×962 113 KB

and when Im trying to paint more green it looks like this :
Zrzut ekranu 2024-12-06 144730
Zrzut ekranu 2024-12-06 1447301920×1187 225 KB