Console logs javascript error in menu management

The following error is logged when selecting an input field when the previous focussed input field loses focus:
TypeError: Cannot assign to read only property 'message' of
at k.$scope.dismissFeedback (http://localhost:8080/cms/angular/menu/states/menu-item/edit/EditMenuItemCtrl.6f012e82.js:108:45)
at shouldSaveSelectedMenuItemProperty (http://localhost:8080/cms/angular/menu/states/menu-item/edit/EditMenuItemCtrl.6f012e82.js:115:28)
at k.$scope.saveSelectedMenuItem (http://localhost:8080/cms/angular/menu/states/menu-item/edit/EditMenuItemCtrl.6f012e82.js:91:25)
at http://localhost:8080/cms/angular/components/angular/angular.min.b2fa50a9.js:177:3
at B.constant (http://localhost:8080/cms/angular/components/angular/angular.min.b2fa50a9.js:170:287)
at http://localhost:8080/cms/angular/components/angular/angular.min.b2fa50a9.js:194:165
at k.$eval (http://localhost:8080/cms/angular/components/angular/angular.min.b2fa50a9.js:112:68)
at k.$apply (http://localhost:8080/cms/angular/components/angular/angular.min.b2fa50a9.js:112:346)
at HTMLInputElement.<anonymous> (http://localhost:8080/cms/angular/components/angular/angular.min.b2fa50a9.js:194:147)
at HTMLInputElement.m.event.dispatch (http://localhost:8080/cms/angular/components/jquery/dist/jquery.min.d4a20d75.js:3:8436)