Road with trench what have different vertical alignment

What is the easiest way to make from the dependent element (corridor) to independent (static) element? For example i have axis of the road along which is trench. Often I keep the same vertical alignment, but sometimes i need it adjust. The easiest way for me is draw on trench axis new profile and select him as active, but nothing happens. I cant set new profil as control for trench axis point, becuse there is dependecy problem (some times program alert this, but more often start endless cycle). I found only one (bad) way - create 3Delement form profile, now create parallel to him and this element can control trench axis.

I also confused what happens when i draw the trench axis of the template and also add to profile my own vertical alignment which i draw as 3D element... Consequently i have in drawing two elements named ditch axis, but in the sheet of elements is only one. Moreover, these two elements are guided somehow, if I change one eg. name or color... this change is reflected in both. 

The newly added 3D element is not a true corridor element (true can not delete). Sometimes I managed to change it to an independent element and therefore was at the root of the 3D elements instead of under the elements of the corridor. But I do not know how I did it :(