diff --git a/src/main/java/org/gcube/portlets/user/td/gwtservice/server/TDGWTServiceImpl.java b/src/main/java/org/gcube/portlets/user/td/gwtservice/server/TDGWTServiceImpl.java
index e02a5fa..b15079f 100644
--- a/src/main/java/org/gcube/portlets/user/td/gwtservice/server/TDGWTServiceImpl.java
+++ b/src/main/java/org/gcube/portlets/user/td/gwtservice/server/TDGWTServiceImpl.java
@@ -9484,16 +9484,24 @@ public class TDGWTServiceImpl extends RemoteServiceServlet implements
 						"Error in apply rules on column: No column selected.");
 			}
 			
-			ArrayList<RuleDescriptionData> rules=applyColumnRulesSession.getRules();
-			ArrayList<RuleId> ruleIds=new ArrayList<RuleId>();
-			for(RuleDescriptionData r:rules){
-				RuleId ruleId=new RuleId(r.getId());
-				ruleIds.add(ruleId);
-			}
-			
 			ColumnLocalId columnLocalId=new ColumnLocalId(column.getColumnId());
 			
-			Task trTask = service.applyColumnRule(tabularResourceId, columnLocalId,ruleIds );
+			ArrayList<RuleDescriptionData> rulesThatWillBeDetach=applyColumnRulesSession.getRulesThatWillBeDetached();
+			ArrayList<RuleId> ruleIdsDetach=new ArrayList<RuleId>();
+			for(RuleDescriptionData r:rulesThatWillBeDetach){
+				RuleId ruleDetachId=new RuleId(r.getId());
+				ruleIdsDetach.add(ruleDetachId);
+			}			
+			service.detachColumnRules(tabularResourceId, columnLocalId,ruleIdsDetach );
+		
+			
+			ArrayList<RuleDescriptionData> rulesThatWillBeApplied=applyColumnRulesSession.getRulesThatWillBeApplied();
+			ArrayList<RuleId> ruleIdsApplied=new ArrayList<RuleId>();
+			for(RuleDescriptionData r:rulesThatWillBeApplied){
+				RuleId ruleAppliedId=new RuleId(r.getId());
+				ruleIdsApplied.add(ruleAppliedId);
+			}
+			Task trTask = service.applyColumnRule(tabularResourceId, columnLocalId,ruleIdsApplied );
 			logger.debug("Rules On Column Apply: TaskId "
 					+ trTask.getId());
 
diff --git a/src/main/java/org/gcube/portlets/user/td/gwtservice/shared/rule/ApplyColumnRulesSession.java b/src/main/java/org/gcube/portlets/user/td/gwtservice/shared/rule/ApplyColumnRulesSession.java
index 1c1abb3..31edf9b 100644
--- a/src/main/java/org/gcube/portlets/user/td/gwtservice/shared/rule/ApplyColumnRulesSession.java
+++ b/src/main/java/org/gcube/portlets/user/td/gwtservice/shared/rule/ApplyColumnRulesSession.java
@@ -17,18 +17,28 @@ public class ApplyColumnRulesSession implements Serializable {
 	private static final long serialVersionUID = -7746819321348425711L;
 	private TRId trId;
 	private ColumnData column;
-	private ArrayList<RuleDescriptionData> rules;
+	private ArrayList<RuleDescriptionData> rulesThatWillBeApplied;
+	private ArrayList<RuleDescriptionData> rulesThatWillBeDetached;
 
 	public ApplyColumnRulesSession() {
 		super();
 	}
 
+	/**
+	 * 
+	 * @param trId
+	 * @param column
+	 * @param rulesThatWillBeApplied
+	 * @param rulesThatWillBeDetached
+	 */
 	public ApplyColumnRulesSession(TRId trId, ColumnData column,
-			ArrayList<RuleDescriptionData> rules) {
+			ArrayList<RuleDescriptionData> rulesThatWillBeApplied,
+			ArrayList<RuleDescriptionData> rulesThatWillBeDetached) {
 		super();
 		this.trId = trId;
 		this.column = column;
-		this.rules = rules;
+		this.rulesThatWillBeApplied = rulesThatWillBeApplied;
+		this.rulesThatWillBeDetached = rulesThatWillBeDetached;
 	}
 
 	public TRId getTrId() {
@@ -47,22 +57,29 @@ public class ApplyColumnRulesSession implements Serializable {
 		this.column = column;
 	}
 
-	public ArrayList<RuleDescriptionData> getRules() {
-		return rules;
+	public ArrayList<RuleDescriptionData> getRulesThatWillBeApplied() {
+		return rulesThatWillBeApplied;
 	}
 
-	public void setRules(ArrayList<RuleDescriptionData> rules) {
-		this.rules = rules;
+	public void setRulesThatWillBeApplied(
+			ArrayList<RuleDescriptionData> rulesThatWillBeApplied) {
+		this.rulesThatWillBeApplied = rulesThatWillBeApplied;
+	}
+
+	public ArrayList<RuleDescriptionData> getRulesThatWillBeDetached() {
+		return rulesThatWillBeDetached;
+	}
+
+	public void setRulesThatWillBeDetached(
+			ArrayList<RuleDescriptionData> rulesThatWillBeDetached) {
+		this.rulesThatWillBeDetached = rulesThatWillBeDetached;
 	}
 
 	@Override
 	public String toString() {
 		return "ApplyColumnRulesSession [trId=" + trId + ", column=" + column
-				+ ", rules=" + rules + "]";
+				+ ", rulesThatWillBeApplied=" + rulesThatWillBeApplied
+				+ ", rulesThatWillBeDetached=" + rulesThatWillBeDetached + "]";
 	}
 
-	
-	
-	
-	
 }