Cannot change DetailView panels

Hello everyone,
I have suitecrm version 7.7.9, Sugar Version 6.5.24 (Build 509), php version 7.0.7.

I’ve already changed panels displayed in Calls -> EditView and Calls -> ListView, but when I try to remove some panels from Calls -> DetailView I get a message “undefined” with a cross only to close the window. The changes seems to be done for the panels have been removed in the Studio but when I look at a detail view of a call all of the old panels are still there…

Does anyone know a solution?

Kind regards