when calling GetPrimaryKeyFieldsFor function

[progsherief]

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dear, exception While trying to use context.UpdateGraph ex: context.UpdateGraph(UpdatedWF, map => map.OwnedCollection(x => x.contexts)); i have this error : ambiguos match found - when calling :GetPrimaryKeyFieldsFor function at return metadata.KeyMembers .Select(k => entityType.GetProperty(k.Name, BindingFlags.Instance | BindingFlags.NonPublic BindingFlags.Public)) .ToList(); line