diff --git a/htdocs/accountancy/journal/sellsjournal.php b/htdocs/accountancy/journal/sellsjournal.php
index 61f503f5fcb..d0c65e8e909 100644
--- a/htdocs/accountancy/journal/sellsjournal.php
+++ b/htdocs/accountancy/journal/sellsjournal.php
@@ -141,8 +141,8 @@ if ($result) {
 
 		// Situation invoices handling
 		$line = new FactureLigne($db);
-		$line->fetch($obj->rowid);
-		$prev_progress = $line->get_prev_progress();
+		$line->fetch($obj->fdid); // id of line
+		$prev_progress = $line->get_prev_progress($obj->rowid);   // id of invoice
 		if ($obj->type == Facture::TYPE_SITUATION) {
 			// Avoid divide by 0
 			if ($obj->situation_percent == 0) {
diff --git a/htdocs/compta/facture.php b/htdocs/compta/facture.php
index 951270c19fe..b45ce4a33e3 100644
--- a/htdocs/compta/facture.php
+++ b/htdocs/compta/facture.php
@@ -1564,7 +1564,7 @@ if (empty($reshook))
 
 		$line = new FactureLigne($db);
 		$line->fetch(GETPOST('lineid'));
-		$percent = $line->get_prev_progress();
+		$percent = $line->get_prev_progress($object->id);
 
 		if (GETPOST('progress') < $percent)
 		{
@@ -1682,7 +1682,7 @@ if (empty($reshook))
 		{
 			foreach ($object->lines as $line)
 			{
-				$percent = $line->get_prev_progress();
+				$percent = $line->get_prev_progress($object->id);
 				if (GETPOST('all_progress') < $percent) {
 					$mesg = '<div class="warning">' . $langs->trans("CantBeLessThanMinPercent") . '</div>';
 					$result = -1;
diff --git a/htdocs/compta/facture/class/facture.class.php b/htdocs/compta/facture/class/facture.class.php
index 7c761ccb40f..0f41620bd89 100644
--- a/htdocs/compta/facture/class/facture.class.php
+++ b/htdocs/compta/facture/class/facture.class.php
@@ -4256,15 +4256,22 @@ class FactureLigne extends CommonInvoiceLine
 	}
 
 	/**
-	 * Returns situation_percent of the previous line
+	 * Returns situation_percent of the previous line.
+	 * Warning: If invoice is a replacement invoice, this->fk_prev_id is id of the replaced line. 
 	 *
-	 * @return int >= 0
+	 * @param  int     $invoiceid      Invoice id
+	 * @return int                     >= 0
 	 */
-	function get_prev_progress()
+	function get_prev_progress($invoiceid)
 	{
 		if (is_null($this->fk_prev_id) || empty($this->fk_prev_id) || $this->fk_prev_id == "") {
 			return 0;
 		} else {
+		    // If invoice is a not a situation invoice, this->fk_prev_id is used for something else
+            $tmpinvoice=new Facture($this->db);
+            $tmpinvoice->fetch($invoiceid);
+            if ($tmpinvoice->type != Facture::TYPE_SITUATION) return 0;
+
 			$sql = 'SELECT situation_percent FROM ' . MAIN_DB_PREFIX . 'facturedet WHERE rowid=' . $this->fk_prev_id;
 			$resql = $this->db->query($sql);
 			if ($resql && $resql->num_rows > 0) {
diff --git a/htdocs/compta/journal/sellsjournal.php b/htdocs/compta/journal/sellsjournal.php
index cddbdcaa064..c0ebdb1aa3a 100644
--- a/htdocs/compta/journal/sellsjournal.php
+++ b/htdocs/compta/journal/sellsjournal.php
@@ -166,8 +166,8 @@ if ($result)
 
 		// Situation invoices handling
 		$line = new FactureLigne($db);
-		$line->fetch($obj->id);
-		$prev_progress = $line->get_prev_progress();
+		$line->fetch($obj->id);   // id of line
+		$prev_progress = $line->get_prev_progress($obj->rowid);   // id on invoice
 		if ($obj->type==Facture::TYPE_SITUATION) {
 			// Avoid divide by 0
 			if ($obj->situation_percent == 0) { 
diff --git a/htdocs/core/modules/facture/doc/pdf_crabe.modules.php b/htdocs/core/modules/facture/doc/pdf_crabe.modules.php
index 8637f02bebc..c627da68418 100644
--- a/htdocs/core/modules/facture/doc/pdf_crabe.modules.php
+++ b/htdocs/core/modules/facture/doc/pdf_crabe.modules.php
@@ -167,7 +167,7 @@ class pdf_crabe extends ModelePDFFactures
 	function write_file($object,$outputlangs,$srctemplatepath='',$hidedetails=0,$hidedesc=0,$hideref=0)
 	{
 		global $user,$langs,$conf,$mysoc,$db,$hookmanager;
-
+		
 		if (! is_object($outputlangs)) $outputlangs=$langs;
 		// For backward compatibility with FPDF, force output charset to ISO, because FPDF expect text to be encoded in ISO
 		if (! empty($conf->global->MAIN_USE_FPDF)) $outputlangs->charset_output='ISO-8859-1';
@@ -540,13 +540,14 @@ class pdf_crabe extends ModelePDFFactures
 					$pdf->MultiCell($this->page_largeur-$this->marge_droite-$this->postotalht, 3, $total_excl_tax, 0, 'R', 0);
 
 					// Collecte des totaux par valeur de tva dans $this->tva["taux"]=total_tva
-					$prev_progress = $object->lines[$i]->get_prev_progress();
+					$prev_progress = $object->lines[$i]->get_prev_progress($object->id);
 					if ($prev_progress > 0) // Compute progress from previous situation
 					{
 						$tvaligne = $object->lines[$i]->total_tva * ($object->lines[$i]->situation_percent - $prev_progress) / $object->lines[$i]->situation_percent;
 					} else {
 						$tvaligne = $object->lines[$i]->total_tva;
 					}
+					
 					$localtax1ligne=$object->lines[$i]->total_localtax1;
 					$localtax2ligne=$object->lines[$i]->total_localtax2;
 					$localtax1_rate=$object->lines[$i]->localtax1_tx;
@@ -1103,7 +1104,8 @@ class pdf_crabe extends ModelePDFFactures
 							}
 						}
 					}
-				//}
+
+                //}
 				// VAT
 				foreach($this->tva as $tvakey => $tvaval)
 				{