If you have access to TEXTJOIN function then you can try approach as provided in attached workbook.
In cell I2,
=TEXTJOIN("-",FALSE,C2:G2)&"_R"&H2
In cell J2 (which you can implement in A2),
=IF(B2="CLD","CANCELLED",IF(TEXT(MAX(IF($C$2:$C$15=C2,IF($D$2:$D$15=D2,IF($E$2:$E$15=E2,IF($F$2:$F$15=F2,IF($G$2:$G$15=G2,$H$2:$H$15+0,-1),-1),-1),-1),-1),-1),"00")=H2,"NEW","SUPERSEDED"))
You may have to CTRL+SHIFT+ENTER if you are not on Office 365.