You need to add OverrideClassName="/Script/CoreUObject.Enum"
to the EnumRedirect for it to work properly. In your case, that would give:
[CoreRedirects]
+EnumRedirects=(OldName="/Game/Misc/EnumsAndStructs/Team.Team", NewName="/Script/Roomball.ETeamEnum",OverrideClassName="/Script/CoreUObject.Enum")