diff --git a/htdocs/core/modules/import/import_xlsx.modules.php b/htdocs/core/modules/import/import_xlsx.modules.php
index 6c0bcc0f4b1..5b2e339a588 100644
--- a/htdocs/core/modules/import/import_xlsx.modules.php
+++ b/htdocs/core/modules/import/import_xlsx.modules.php
@@ -173,7 +173,7 @@ class ImportXlsx extends ModeleImports
 		$this->workbook->getActiveSheet()->getStyle('1')->getFont()->setBold(true);
 		$this->workbook->getActiveSheet()->getStyle('1')->getAlignment()->setHorizontal(Alignment::HORIZONTAL_LEFT);
 
-		$col = 0;
+		$col = 1;
 		foreach ($headerlinefields as $field) {
 			$this->workbook->getActiveSheet()->SetCellValueByColumnAndRow($col, 1, $outputlangs->transnoentities($field));
 			// set autowidth
@@ -195,7 +195,7 @@ class ImportXlsx extends ModeleImports
 	public function write_record_example($outputlangs, $contentlinevalues)
 	{
 		// phpcs:enable
-		$col = 0;
+		$col = 1;
 		$row = 2;
 		foreach ($contentlinevalues as $cell) {
 			$this->workbook->getActiveSheet()->SetCellValueByColumnAndRow($col, $row, $cell);
@@ -289,7 +289,7 @@ class ImportXlsx extends ModeleImports
 		$xlsx = new Xlsx();
 		$info = $xlsx->listWorksheetinfo($this->file);
 		$countcolumns = $info[0]['totalColumns'];
-		for ($col = 0; $col < $countcolumns; $col++) {
+		for ($col = 1; $col <= $countcolumns; $col++) {
 			$this->headers[$col] = $this->workbook->getActiveSheet()->getCellByColumnAndRow($col, 1)->getValue();
 		}
 		return 0;
@@ -314,7 +314,7 @@ class ImportXlsx extends ModeleImports
 		$xlsx = new Xlsx();
 		$info = $xlsx->listWorksheetinfo($this->file);
 		$countcolumns = $info[0]['totalColumns'];
-		for ($col = 0; $col < $countcolumns; $col++) {
+		for ($col = 1; $col <= $countcolumns; $col++) {
 			$val = $this->workbook->getActiveSheet()->getCellByColumnAndRow($col, $this->record)->getValue();
 			$array[$col]['val'] = $val;
 			$array[$col]['type'] = (dol_strlen($val) ? 1 : -1); // If empty we consider it null
@@ -372,7 +372,7 @@ class ImportXlsx extends ModeleImports
 
 		//var_dump($sort_array_match_file_to_database);
 
-		if (count($arrayrecord) == 0 || (count($arrayrecord) == 1 && empty($arrayrecord[0]['val']))) {
+		if (count($arrayrecord) == 0 || (count($arrayrecord) == 1 && empty($arrayrecord[1]['val']))) {
 			//print 'W';
 			$this->warnings[$warning]['lib'] = $langs->trans('EmptyLine');
 			$this->warnings[$warning]['type'] = 'EMPTY';
@@ -420,7 +420,7 @@ class ImportXlsx extends ModeleImports
 					if ($key <= $maxfields) {
 						// Set $newval with value to insert and set $listvalues with sql request part for insert
 						$newval = '';
-						if ($arrayrecord[($key - 1)]['type'] > 0) $newval = $arrayrecord[($key - 1)]['val']; // If type of field into input file is not empty string (so defined into input file), we get value
+						if ($arrayrecord[($key)]['type'] > 0) $newval = $arrayrecord[($key)]['val']; // If type of field into input file is not empty string (so defined into input file), we get value
 
 						// Make some tests on $newval
 
@@ -572,21 +572,21 @@ class ImportXlsx extends ModeleImports
 										$newval = $this->thirpartyobject->code_client;
 										//print 'code_client='.$newval;
 									}
-									if (empty($newval)) $arrayrecord[($key - 1)]['type'] = -1; // If we get empty value, we will use "null"
+									if (empty($newval)) $arrayrecord[($key)]['type'] = -1; // If we get empty value, we will use "null"
 								} elseif ($objimport->array_import_convertvalue[0][$val]['rule'] == 'getsuppliercodeifauto') {
 									if (strtolower($newval) == 'auto') {
 										$newval = $this->thirpartyobject->get_codefournisseur(0, 1);
 										$newval = $this->thirpartyobject->code_fournisseur;
 										//print 'code_fournisseur='.$newval;
 									}
-									if (empty($newval)) $arrayrecord[($key - 1)]['type'] = -1; // If we get empty value, we will use "null"
+									if (empty($newval)) $arrayrecord[($key)]['type'] = -1; // If we get empty value, we will use "null"
 								} elseif ($objimport->array_import_convertvalue[0][$val]['rule'] == 'getcustomeraccountancycodeifauto') {
 									if (strtolower($newval) == 'auto') {
 										$this->thirpartyobject->get_codecompta('customer');
 										$newval = $this->thirpartyobject->code_compta;
 										//print 'code_compta='.$newval;
 									}
-									if (empty($newval)) $arrayrecord[($key - 1)]['type'] = -1; // If we get empty value, we will use "null"
+									if (empty($newval)) $arrayrecord[($key)]['type'] = -1; // If we get empty value, we will use "null"
 								} elseif ($objimport->array_import_convertvalue[0][$val]['rule'] == 'getsupplieraccountancycodeifauto') {
 									if (strtolower($newval) == 'auto') {
 										$this->thirpartyobject->get_codecompta('supplier');
@@ -594,7 +594,7 @@ class ImportXlsx extends ModeleImports
 										if (empty($newval)) $arrayrecord[($key - 1)]['type'] = -1; // If we get empty value, we will use "null"
 										//print 'code_compta_fournisseur='.$newval;
 									}
-									if (empty($newval)) $arrayrecord[($key - 1)]['type'] = -1; // If we get empty value, we will use "null"
+									if (empty($newval)) $arrayrecord[($key)]['type'] = -1; // If we get empty value, we will use "null"
 								} elseif ($objimport->array_import_convertvalue[0][$val]['rule'] == 'getrefifauto') {
 									$defaultref = '';
 									// TODO provide the $modTask (module of generation of ref) as parameter of import_insert function
@@ -624,7 +624,7 @@ class ImportXlsx extends ModeleImports
 										$errorforthistable++;
 										$error++;
 									} else {
-										$newval = $arrayrecord[($key - 1)]['val']; //We get new value computed.
+										$newval = $arrayrecord[($key)]['val']; //We get new value computed.
 									}
 								} elseif ($objimport->array_import_convertvalue[0][$val]['rule'] == 'numeric') {
 									$newval = price2num($newval);
@@ -695,8 +695,8 @@ class ImportXlsx extends ModeleImports
 						$listfields[] = $fieldname;
 
 						// Note: arrayrecord (and 'type') is filled with ->import_read_record called by import.php page before calling import_insert
-						if (empty($newval) && $arrayrecord[($key - 1)]['type'] < 0)		 $listvalues[] = ($newval == '0' ? $newval : "null");
-						elseif (empty($newval) && $arrayrecord[($key - 1)]['type'] == 0)	 $listvalues[] = "''";
+						if (empty($newval) && $arrayrecord[($key)]['type'] < 0)		 $listvalues[] = ($newval == '0' ? $newval : "null");
+						elseif (empty($newval) && $arrayrecord[($key)]['type'] == 0)	 $listvalues[] = "''";
 						else $listvalues[] = "'" . $this->db->escape($newval) . "'";
 					}
 					$i++;
diff --git a/htdocs/core/modules/modProduct.class.php b/htdocs/core/modules/modProduct.class.php
index a55c824a8ee..b4c1dd13e7d 100644
--- a/htdocs/core/modules/modProduct.class.php
+++ b/htdocs/core/modules/modProduct.class.php
@@ -550,7 +550,7 @@ class modProduct extends DolibarrModules
 
 		// field order as per structure of table llx_product
 		$import_sample = array(
-			'p.ref' => "PREF123456",
+			'p.ref' => "ref:PREF123456",
 			'p.datec' => dol_print_date(dol_now(), '%Y-%m-%d'),
 			'p.label' => "Product name in default language",
 			'p.description' => "Product description in default language",
@@ -690,7 +690,7 @@ class modProduct extends DolibarrModules
 			);
 
 			$this->import_examplevalues_array[$r] = array(
-				'sp.fk_product' => "PRODUCT_REF or id:123456",
+				'sp.fk_product' => "ref:PRODUCT_REF or id:123456",
 				'sp.fk_soc' => "My Supplier",
 				'sp.ref_fourn' => "XYZ-F123456",
 				'sp.quantity' => "5",
@@ -752,13 +752,13 @@ class modProduct extends DolibarrModules
 			$this->import_convertvalue_array[$r] = array(
 				'pr.fk_product'=>array('rule'=>'fetchidfromref', 'classfile'=>'/product/class/product.class.php', 'class'=>'Product', 'method'=>'fetch', 'element'=>'Product')
 			);
-			$this->import_examplevalues_array[$r] = array('pr.fk_product'=>"PRODUCT_REF or id:123456",
+			$this->import_examplevalues_array[$r] = array('pr.fk_product'=>"ref:PRODUCT_REF or id:123456",
 				'pr.price_base_type'=>"HT (for excl tax) or TTC (for inc tax)", 'pr.price_level'=>"1",
 				'pr.price'=>"100", 'pr.price_ttc'=>"110",
 				'pr.price_min'=>"100", 'pr.price_min_ttc'=>"110",
 				'pr.tva_tx'=>'20',
 				'pr.recuperableonly'=>'0',
-				'pr.date_price'=>'2013-04-10');
+				'pr.date_price'=>'2020-12-31');
 		}
 
 		if (!empty($conf->global->MAIN_MULTILANGS))