how to get the name of the extra variable into a proc compare

[alepage]

Hello,

I am adding a new variable into a spde dataset, thereafter I am doing a proc compare.

But I am getting different variables length while it is not the case.

Can I trust my new datasets? Why are we getting those results?

libname  BANDE1 spde '/.../Temp/Alain/test/Classic/gc/auto';
libname  BANDE2 spde '/.../Temp/Alain/test/Classic/gc/habi';
libname  BANDE3 spde '/.../Temp/Alain/test/Classic/gc/entr';

libname  BANDE4 spde '/.../Temp/Alain/test/Classic/gc2/auto';
libname  BANDE5 spde '/.../Temp/Alain/test/Classic/gc2/habi';
libname  BANDE6 spde '/.../Temp/Alain/test/Classic/gc2/entr';

%let co=gc;
%let moisc=feb;
%let year=2025;

Data BANDE4.&CO._AUTO_PRM&MOISC.&YEAR. ;
ORGNL_SAS_DS_ROW_NBR=_N_;
set BANDE1.&CO._AUTO_PRM&MOISC.&YEAR. ;
run;

/****** Bande2 for Property *****/

Data BANDE5.&CO._PROP_PRM&MOISC.&YEAR. ;
ORGNL_SAS_DS_ROW_NBR=_N_;
set BANDE2.&CO._PROP_PRM&MOISC.&YEAR. ;
run;

/****** Bande3 for Enterprise *****/
data BANDE6.&CO._CNA_PRM&MOISC.&YEAR. ;
ORGNL_SAS_DS_ROW_NBR=_N_;
set BANDE3.&CO._CNA_PRM&MOISC.&YEAR. ;
run;

/****** The proc compare steps *********/

proc compare base=bande1.&CO._AUTO_PRM&MOISC.&YEAR. compare=BANDE4.&CO._AUTO_PRM&MOISC.&YEAR. 
listvar;
run;
proc compare base=bande2.&CO._prop_PRM&MOISC.&YEAR. compare=BANDE5.&CO._prop_PRM&MOISC.&YEAR. 
listvar ;
run;
proc compare base=bande3.&CO._CNA_PRM&MOISC.&YEAR.  compare=BANDE6.&CO._CNA_PRM&MOISC.&YEAR.  
listvar ;
run;

Extract of the log:

[data_null__]

I see no difference other than variable LABEL.  Based on the PROC COMPARE output.

[alepage]

I would like to know why when we add just one more variable like orgnl_sas_ds_row_nbr, the label into the new dataset become blank instead of transfering the previoius label.  

How to correct that issue?