Hwasong-17A (?) -- Why the HS-17 was changed ?

 

Norbert Brügge, Germany
 

2022, November 08 -- North Korea has successful launched an intercontinental ballistic missile (ICBM) from the Sunan area near Pyongyang.

There is now photos of the launch. They shows a changed HS-17.The modifications affect both stages of the missile.. The first stage was shortened by about 1.5 m and the second stage was lengthened by 1.5 m. The missile is called HS-17A here. Why was changed the HS-17. One reason may be that the HS-17 is unsuitable as an ICBM and really only corresponds to the first stage of a future Unha-X (SLV) and the HS-17A (?) is optimized as an really ICBM.