Hi Hsai Lurn Leng,

Could you elaborate a bit on this border edit? This is second time that you have deleted this way https://www.openstreetmap.org/way/1391567645

which is/was part of this relation https://www.openstreetmap.org/relation/17883478

As you can see, this relation is now open on one end, and due to that it's "broken" and not valid. For boundary relation to be valid it needs to form closed circle. 

Could you fix the boundary relation or explain in detail what are you trying to achieve? Because you stated that your intention is to fix presumably border but this only created an additional issue.

Best regards