# Tweet by [@keefmoon](http://twitter.com/keefmoon) on 2019-08-31 23:17:04 > [!INFO] Archived from [original tweet](http://twitter.com/keefmoon/status/1167939388631732225) So, if you are using systemSizeFittingSize and you change a layout constraint, you have to remove the constraint and add a newly created constraint. Is this a known thing? Because I just spent 2 days finding that out :/