diff --git a/html/annulation.php b/html/annulation.php
index 4cd52c22c..f39e4c620 100644
--- a/html/annulation.php
+++ b/html/annulation.php
@@ -101,21 +101,28 @@ if  ($p_id != -1 ) { // A
       // the operation is voided thanks the opposite operation
    StartSql($cn);
    $p_internal=SetInternalCode($cn,$p_id,$l_array['jr_id']);
-   $grp_new=NextSequence($cn,'s_jrn_'.$l_array['jr_id']);
+   $grp_new=NextSequence($cn,'s_grpt');
    $sql= "insert into jrn (
   		jr_def_id,jr_montant,jr_comment,               
 		jr_date,jr_grpt_id,jr_internal                 
 		,jr_tech_per, jr_valid
   		) select jr_def_id,jr_montant,'Annulation '||jr_comment,
 		now(),$grp_new,'$p_internal',
-		$period, true
-	  from
+		$period, true 
+          from
 	  jrn
 	  where   jr_grpt_id=".$_POST['p_id'];
    $Res=ExecSql($cn,$sql);
    // Check return code
    if ( $Res == false ) { Rollback($cn);exit(-1);}
-   // Make also the change into jrnx
+   // Mark the operation invalid into the ledger
+   // to avoid to nullify twice the same op.
+   $sql="update jrn set jr_valid=false where jr_grpt_id=".$_POST['p_id'];
+   $Res=ExecSql($cn,$sql);
+   // Check return code
+   if ( $Res == false ) { Rollback($cn);exit(-1);}
+ 
+  // Make also the change into jrnx
    $sql= "insert into jrnx (
   	        j_date,j_montant,j_poste,j_grpt,               
                 j_jrn_def,j_debit,j_text,j_internal,j_tech_user
diff --git a/include/form_input.php b/include/form_input.php
index 33fd60ff5..1a63279c2 100644
--- a/include/form_input.php
+++ b/include/form_input.php
@@ -1102,9 +1102,7 @@ function RecordAchat($p_cn,$p_array,$p_user,$p_jrn)
     // First we add in jrnx
 	
   // Compute the j_grpt
-  // NOTE STAN: pourquoi "+1" à la ligne suivante? Je pense que le GetNextId retourne déja un truc incrémenté, non?  
-  // en effet non, car je vois dans la table "jrnx" que le j_grpt n'est incrémenté que de un.
-  $seq=GetNextId($p_cn,'j_grpt')+1;
+  $seq=NextSequence($p_cn,'j_grpt');
   
   
   // Debit = client
@@ -1417,7 +1415,7 @@ function RecordFin($p_cn,$p_array,$p_user,$p_jrn) {
     //    $type=( ${"e_other$i"."_amount"} < 0 )?'d':'c';
 
     // Compute the j_grpt
-    $seq=GetNextId($p_cn,'j_grpt')+1;
+    $seq=NextSequence($p_cn,'j_grpt');
 
     if ( InsertJrnx($p_cn,'d',$p_user,$p_jrn,$poste_bq,$e_date,${"e_other$i"."_amount"},$seq,$periode) == false ) {
       $Rollback($p_cn);exit("error __FILE__ __LINE__");
@@ -1667,7 +1665,7 @@ function RecordODS($p_cn,$p_array,$p_user,$p_jrn)
   $sum_cred=0.0;
 
 	// Compute the j_grpt
-  $seq=GetNextId($p_cn,'j_grpt')+1;
+  $seq=NextSequence($p_cn,'j_grpt');
 
   StartSql($p_cn);
   // store into the database
diff --git a/include/jrn.php b/include/jrn.php
index 0f54f73c9..f819f48f5 100644
--- a/include/jrn.php
+++ b/include/jrn.php
@@ -562,48 +562,6 @@ function GetJrnProp($p_dossier,$p_jrn,$is_connected=0)
   }
   return pg_fetch_array($Res,0);
 }
-/* function  GetNextId($p_cn,$p_name) 
- * Purpose :
- * 
- * parm : 
- *	- 
- * gen :
- *	-
- * return:
- *	-
- *
- */ 
-function GetNextId($p_cn,$p_name) {
-  include_once("postgres.php");
-
-  $Res=ExecSql($p_cn,"select max($p_name) as result from jrnx");
-  echo_debug(__FILE__,__LINE__,"$Res=ExecSql($p_cn,"."select max($p_name) as result from jrnx");
-  if (pg_NumRows($Res) == 0 )
-    return 0;
-  $l_res=pg_fetch_array($Res,0);
-  return $l_res['result'];
-}
-/* function GetNextJrnId($p_cn,$p_name) 
- * Purpose :
- * 
- * parm : 
- *	- 
- * gen :
- *	-
- * return:
- *	-
- *
- */ 
-function GetNextJrnId($p_cn,$p_name) {
-  include_once("postgres.php");
-  $Res=ExecSql($p_cn,"select max($p_name) as result from jrn ");
-  echo_debug(__FILE__,__LINE__,"$Res=ExecSql($p_cn,"."select max($p_name) as result from jrn ");
-
-  if (pg_NumRows($Res) == 0 )
-    return 0;
-  $l_res=pg_fetch_array($Res,0);
-  return $l_res['result'];
-}
 /* function ViewJrn
  * Purpose : Vue des écritures comptables
  *