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AnimBlueprintGeneratedClass Error.Hot to fix it.

A few days ago,I upgrade UE4 from 4.10 to 4.11.When I open the editor,there was a Warning:
35bace11d690de290fdcd6cd62ea5fb55ee9fd28.png
and
0ccee82195c2cbf31161e87f026778dddc78b874.png
Anyone knows how to fix it,thanks.