Above mentioned update was done on 24/05/18. Today again it was successfully installed.
See update1.png and update2.png attached.
Click image for larger version. 

Name:	update1.png 
Views:	2 
Size:	180.9 KB 
ID:	191974Click image for larger version. 

Name:	update2.PNG 
Views:	1 
Size:	38.0 KB 
ID:	191975
Why this happens?