diff --git a/src/fr/inra/pappso/xtandempipeline/Utils.java b/src/fr/inra/pappso/xtandempipeline/Utils.java
index 7820da745b0c61f922329cd8bdf6aa1ddc6342a0..336c7a077b1c99b6f483bda0b3cb78e39dc034dc 100644
--- a/src/fr/inra/pappso/xtandempipeline/Utils.java
+++ b/src/fr/inra/pappso/xtandempipeline/Utils.java
@@ -31,7 +31,6 @@ import fr.inra.pappso.xtandempipeline.class_msms.GroupingProtein.PeptideMass;
 import fr.inra.pappso.xtandempipeline.grouping.Group;
 import fr.inra.pappso.xtandempipeline.grouping.HashSampleScanSetPhospho;
 import fr.inra.pappso.xtandempipeline.grouping.SubGroup;
-import fr.inra.pappso.xtandempipeline.grouping.interfaces.GrpProtMatch;
 
 public class Utils {
 	private static final Logger logger = Logger.getLogger(Utils.class);
@@ -80,7 +79,6 @@ public class Utils {
 			throw new MSMSException(message);
 		}
 		return "pep" + getPappsoGroupingId(group.getNumber())
-				+ getPappsoGroupingId(sg.getNumber())
 				+ getPappsoGroupingId(peptideMass.getNumber());
 	}