diff --git a/ci-scripts/conf_files/gnb.band78.tm1.fr1.106PRB.usrpb210.conf b/ci-scripts/conf_files/gnb.band78.tm1.fr1.106PRB.usrpb210.conf
index 205922af0c25b6a87766bffd8c80cf7bb14db4d3..86293f2297a343711135a9cc9e1948675235a07b 100644
--- a/ci-scripts/conf_files/gnb.band78.tm1.fr1.106PRB.usrpb210.conf
+++ b/ci-scripts/conf_files/gnb.band78.tm1.fr1.106PRB.usrpb210.conf
@@ -126,7 +126,7 @@ gNBs =
 
         initialULBWPk2_1                      = 6;  # used for mixed slot
         initialULBWPmappingType_1             = 1;
-        initialULBWPstartSymbolAndLength_1    = 69; # this is SS=10 L=2
+        initialULBWPstartSymbolAndLength_1    = 52; # this is SS=10 L=4
 
         initialULBWPk2_2                      = 7;  # used for Msg.3 during RA
         initialULBWPmappingType_2             = 1;