It’s impossible to use dash in CMS uri path '-'while typing the path,
to reproduce error
Create random CRM collection with 5 CMS Pages.
Type the following into the uri path of each CMS page URI
You can type ‘one’ but you cannot type ‘one-two’ - instead what is typed is onetwo, and then I must manually insert ‘-’ between ‘one’ and ‘two’ to make ‘one-two’.