Inner structure breaks outer wall

Hello everybody,
I have some troubles when slicing a certain part (–> elevator of JRM02-XC40) from aerojtp.com. The inner structure of this elevator part has a long slot inside for being put on a round CFK-rod. I could not find any setting in Creality print to prevent that this inner structure breaks the outer wall as you can see on the photo. Because the print data is bought from aerojtp I do not think that the file is damaged. I think this is a problem of the printer settings.

Has anybody an idea to handle this? Because the data is bought I think I am not allowed to publish the file here

Thank you for your help.

Regards, Uli