No feedback on saving category with duplicate key (No error is displayed)

[rs2487]

Q	A
Bug?	yes
New Feature?	no
Sulu Version	1.6.18
Browser Version	FF 59

Actual Behavior

Adding a category with an existing key response a error but this error is not displayed to the user

Expected Behavior

Error is displayed to the user.

Steps to Reproduce

1. Add category with a key
2. Add a second category with same key

Possible Solutions

Check in Frontend is:

if (jqXHR.status === 409 && jqXHR.responseJSON.code === 2002) {

but code in response is 0.

What correct? The if or the code in response json?

[danrot]

2002 seems to be the error for the other keywords (the one shown in the table). But nevertheless this is a bug, that needs to be addressed...