Page management - Angular js errors when user attempts to create a page with a name that already exists with different URL

1. Login as admin/editor
2. Navigate to Channel manager >> my project >> edit channel >> pages
3. Click on add new page
4. In page title add "about" (this already exists)
5. change the URL to abouttest
6. Click create page button

Expected - The page should not be created or a warning should be shown that same name page already exists. User should not be allowed to proceed with this changes
Actual - The new page is created successfully, in browser console below errors are shown

Error: [$rootScope:infdig] 10 $digest() iterations reached. Aborting! Watchers fired in the last 5 iterations: [["fn: $locationWatch; newVal: 9; oldVal: 8"],["fn: $locationWatch; newVal: 10; oldVal: 9"],["fn: $locationWatch; newVal: 11; oldVal: 10"],["fn: $locationWatch; newVal: 12; oldVal: 11"],["fn: $locationWatch; newVal: 13; oldVal: 12"]] http://errors.angularjs.org/1.2.14-build.2302+sha.f827d64/$rootScope/infdig?p0=10&p1=%5B%5B%22fn%3A%20%24locationWatch%3B%20newVal%3A%209%3B%20oldVal%3A%208%22%5D%2C%5B%22fn%3A%20%24locationWatch%3B%20newVal%3A%2010%3B%20oldVal%3A%209%22%5D%2C%5B%22fn%3A%20%24locationWatch%3B%20newVal%3A%2011%3B%20oldVal%3A%2010%22%5D%2C%5B%22fn%3A%20%24locationWatch%3B%20newVal%3A%2012%3B%20oldVal%3A%2011%22%5D%2C%5B%22fn%3A%20%24locationWatch%3B%20newVal%3A%2013%3B%20oldVal%3A%2012%22%5D%5D minErr/<@http://localhost:8080/cms/angular/components/angular/angular.js:78 Scope.prototype.$digest@http://localhost:8080/cms/angular/components/angular/angular.js:11909 Scope.prototype.$apply@http://localhost:8080/cms/angular/components/angular/angular.js:12116 ngEventDirectives[directiveName]</<.compile/</<@http://localhost:8080/cms/angular/components/angular/angular.js:18026 x.event.dispatch@http://localhost:8080/cms/angular/components/jquery/jquery.min.js:5 x.event.add/v.handle@http://localhost:8080/cms/angular/components/jquery/jquery.min.js:5