diff --git a/htdocs/product/admin/product_tools.php b/htdocs/product/admin/product_tools.php
index 5cb378241dc..6e7e0513576 100644
--- a/htdocs/product/admin/product_tools.php
+++ b/htdocs/product/admin/product_tools.php
@@ -82,32 +82,11 @@ if ($action == 'convert')
 				$ret=$objectstatic->fetch($obj->rowid);
 				if ($ret > 0)
 				{
-					$price_base_type = $objectstatic->price_base_type;	// Get price_base_type of product/service to keep the same for update
-					if ($price_base_type == 'TTC')
-					{
-						$newprice=price2num($objectstatic->price_ttc,'MU');    // Second param must be MU (we want a unit price so 'MU'. If unit price was on 4 decimal, we must keep 4 decimals)
-						$newminprice=$objectstatic->price_min_ttc;
-					}
-					else
-					{
-						$newprice=price2num($objectstatic->price,'MU');    // Second param must be MU (we want a unit price so 'MU'. If unit price was on 4 decimal, we must keep 4 decimals)
-						$newminprice=$objectstatic->price_min;
-					}
-					if ($newminprice > $newprice) $newminprice=$newprice;
-					$newvat=str_replace('*','',$newvatrate);
-					$newnpr=$objectstatic->recuperableonly;
-					$newlevel=0;
+					$ret=0; $retm=0; $updatelevel1=false;
 
-					$ret=0; $retm=0;
-
-					// Update single price
-					if (! empty($price_base_type))
-					{
-						print "$newprice, $price_base_type, $newvat, $newminprice, $newlevel, $newnpr<br>\n";
-						$ret=$objectstatic->updatePrice($objectstatic->id, $newprice, $price_base_type, $user, $newvat, $newminprice, $newlevel, $newnpr);
-					}
 					// Update multiprice
-					foreach ($objectstatic->multiprices as $level => $multiprices)
+					$listofmulti=array_reverse($objectstatic->multiprices, true);	// To finish with level 1
+					foreach ($listofmulti as $level => $multiprices)
 					{
 						$price_base_type = $objectstatic->multiprices_base_type[$level];	// Get price_base_type of product/service to keep the same for update
 						if (empty($price_base_type)) continue;	// Discard not defined price levels
@@ -127,15 +106,39 @@ if ($action == 'convert')
 						$newnpr=$objectstatic->multiprices_recuperableonly[$level];
 						$newlevel=$level;
 
-						print "$newprice, $price_base_type, $newvat, $newminprice, $newlevel, $newnpr<br>\n";
-						$retm=$objectstatic->updatePrice($objectstatic->id, $newprice, $price_base_type, $user, $newvat, $newminprice, $newlevel, $newnpr);
+						//print "$objectstatic->id $newprice, $price_base_type, $newvat, $newminprice, $newlevel, $newnpr<br>\n";
+						$retm=$objectstatic->updatePrice($newprice, $price_base_type, $user, $newvat, $newminprice, $newlevel, $newnpr);
 						if ($retm < 0)
 						{
 							$error++;
 							break;
 						}
+
+						if ($newlevel == 1) $updatelevel1=true;
 					}
 
+					// Update single price
+					$price_base_type = $objectstatic->price_base_type;	// Get price_base_type of product/service to keep the same for update
+					if ($price_base_type == 'TTC')
+					{
+						$newprice=price2num($objectstatic->price_ttc,'MU');    // Second param must be MU (we want a unit price so 'MU'. If unit price was on 4 decimal, we must keep 4 decimals)
+						$newminprice=$objectstatic->price_min_ttc;
+					}
+					else
+					{
+						$newprice=price2num($objectstatic->price,'MU');    // Second param must be MU (we want a unit price so 'MU'. If unit price was on 4 decimal, we must keep 4 decimals)
+						$newminprice=$objectstatic->price_min;
+					}
+					if ($newminprice > $newprice) $newminprice=$newprice;
+					$newvat=str_replace('*','',$newvatrate);
+					$newnpr=$objectstatic->recuperableonly;
+					$newlevel=0;
+					if (! empty($price_base_type) && ! $updatelevel1)
+					{
+						//print "$objectstatic->id $newprice, $price_base_type, $newvat, $newminprice, $newlevel, $newnpr<br>\n";
+						$ret=$objectstatic->updatePrice($newprice, $price_base_type, $user, $newvat, $newminprice, $newlevel, $newnpr);
+					}
+
 					if ($ret < 0 || $retm < 0) $error++;
 					else $nbrecordsmodified++;
 				}