I'm pretty sure you can't disable this warning prompt. It is a fairly innocuous warning though...It just informs you that if you have Corridors, Layout Profiles, Sample Lines, etc. already based on the initial Alignment Stationing, you will have a lot of stuff to redo.
If you haven't created anything off of the Alignment yet, just click OK to accept prompt and adjust the Starting Station, etc.
I hope this helps.
Michael M. Carlson
Senior Civil Designer
CADD Manager
AutoCAD Civil 3D Infrastructure Design Professional
AutoCAD Design Professional
Is there a particular reason why you would need it disabled? Changing reference stations of an alignment is not something I have known to be something that one does all the time.
Christopher T. Cowgill, P.E.
AutoCAD Certified Professional
Civil 3D Certified Professional
Civil 3D 2024 on Windows 10
Please select the Accept as Solution button if my post solves your issue or answers your question.