diff --git a/application/cmdbabstract.class.inc.php b/application/cmdbabstract.class.inc.php
index b390a8c65..2eb51f155 100644
--- a/application/cmdbabstract.class.inc.php
+++ b/application/cmdbabstract.class.inc.php
@@ -728,7 +728,7 @@ HTML
 				$oClassIcon = new MedallionIcon(MetaModel::GetClassIcon($sTargetClass, false));
 				$oClassIcon->SetDescription($oAttDef->GetDescription())->AddCSSClass('ibo-block-list--medallion');
 				$oPage->AddUiBlock($oClassIcon);
-				
+
 				$sDisplayValue = ''; // not used
 				$sHTMLValue = "<span id=\"field_{$sInputId}\">".self::GetFormElementForField($oPage, $sClass, $sAttCode,
 						$oAttDef, $oLinkSet, $sDisplayValue, $sInputId, '', $iFlags, $aArgs).'</span>';
@@ -5195,10 +5195,13 @@ EOF
 				$sStatus = $bResult ? Dict::S('UI:BulkModifyStatusModified') : Dict::S('UI:BulkModifyStatusSkipped');
 			}
 
+			$aErrorsToDisplay = array_map(function($sError) {
+				return utils::HtmlEntities($sError);
+			}, $aErrors);
 			$aRows[] = array(
 				'object' => $oObj->GetHyperlink(),
 				'status' => $sStatus,
-				'errors' => '<p>'.($bResult ? '' : implode('</p><p>', $aErrors)).'</p>',
+				'errors' => '<p>'.($bResult ? '' : implode('</p><p>', $aErrorsToDisplay)).'</p>',
 			);
 			if ($bResult && (!$bPreview)) {
 				$oObj->DBUpdate();
@@ -5207,7 +5210,7 @@ EOF
 		set_time_limit(intval($iPreviousTimeLimit));
 		$oTable = DataTableUIBlockFactory::MakeForForm('BulkModify', $aHeaders, $aRows);
 		$oTable->AddOption("bFullscreen", true);
-		
+
 		$oPanel = PanelUIBlockFactory::MakeForClass($sClass, '');
 		$oPanel->SetIcon($sClassIcon);
 		$oPanel->SetTitle($sHeaderTitle);
@@ -5413,13 +5416,13 @@ EOF
 					$oFailAlertBlock = AlertUIBlockFactory::MakeForDanger('', Dict::S('UI:Delete:SorryDeletionNotAllowed'));
 					$oFailAlertBlock->SetIsClosable(false);
 					$oP->AddUiBlock($oFailAlertBlock);
-				} 
+				}
 				else {
 					$oWarningAlertBlock = AlertUIBlockFactory::MakeForWarning('', Dict::S('UI:Delete:PleaseDoTheManualOperations'));
 					$oWarningAlertBlock->SetIsClosable(false);
 					$oP->AddUiBlock($oWarningAlertBlock);
 				}
-				
+
 				$oForm = FormUIBlockFactory::MakeStandard('');
 				$oP->AddSubBlock($oForm);
 				$oForm->AddSubBlock(InputUIBlockFactory::MakeForHidden('transaction_id', utils::ReadParam('transaction_id', '', false, 'transaction_id')));
diff --git a/core/dbobject.class.php b/core/dbobject.class.php
index ce7e74775..d71485a09 100644
--- a/core/dbobject.class.php
+++ b/core/dbobject.class.php
@@ -1930,7 +1930,7 @@ abstract class DBObject implements iDisplay
 				/** @var \AttributeExternalKey $oAtt */
 				$sTargetClass = $oAtt->GetTargetClass();
 				if (false === MetaModel::IsObjectInDB($sTargetClass, $toCheck)) {
-					return "Target object not found (".utils::HtmlEntities($sTargetClass).".::".utils::HtmlEntities($toCheck).")";
+					return "Target object not found (".$sTargetClass.".::".$toCheck.")";
 				}
 			}
 			if ($oAtt->IsHierarchicalKey())
@@ -1939,7 +1939,7 @@ abstract class DBObject implements iDisplay
 				$aValues = $oAtt->GetAllowedValues(array('this' => $this));
 				if (!array_key_exists($toCheck, $aValues))
 				{
-					return "Value not allowed [". utils::HtmlEntities($toCheck)."]";
+					return "Value not allowed [$toCheck]";
 				}
 			}
 		}
@@ -1953,7 +1953,7 @@ abstract class DBObject implements iDisplay
 					$oTag->SetValues(explode(' ', $toCheck));
 				} catch (Exception $e)
 				{
-					return "Tag value [". utils::HtmlEntities($toCheck)."] is not a valid tag list";
+					return "Tag value '$toCheck' is not a valid tag list";
 				}
 
 				return true;
@@ -1981,7 +1981,7 @@ abstract class DBObject implements iDisplay
 					$oTag->SetValues($aValues);
 				} catch (Exception $e)
 				{
-					return "Set value[". utils::HtmlEntities($toCheck)."] is not a valid set";
+					return "Set value '$toCheck' is not a valid set";
 				}
 
 				return true;
@@ -2001,7 +2001,7 @@ abstract class DBObject implements iDisplay
 			{
 				if (!array_key_exists($toCheck, $aValues))
 				{
-					return "Value not allowed [". utils::HtmlEntities($toCheck)."]";
+					return "Value not allowed [$toCheck]";
 				}
 			}
 			if (!is_null($iMaxSize = $oAtt->GetMaxSize()))
@@ -2014,7 +2014,7 @@ abstract class DBObject implements iDisplay
 			}
 			if (!$oAtt->CheckFormat($toCheck))
 			{
-				return "Wrong format [". utils::HtmlEntities($toCheck)."]";
+				return "Wrong format [$toCheck]";
 			}
 		}
 		else
diff --git a/js/console_form_handler.js b/js/console_form_handler.js
index 194a78629..24e428cc2 100644
--- a/js/console_form_handler.js
+++ b/js/console_form_handler.js
@@ -35,8 +35,7 @@ $(function()
         {
             var me = this;
             
-            this.element
-                .append('<div class="last-error"></div>')
+            this.element.append('<div class="last-error"></div>')
                 .addClass('console_form_handler');
 
             this.options.oWizardHelper = window[this.options.wizard_helper_var_name];
@@ -48,13 +47,13 @@ $(function()
         // revert other modifications here
         _destroy: function()
         {
-            this.element
-            .removeClass('console_form_handler');
+            this.element.removeClass('console_form_handler');
             this._super();
         },
         _onUpdateFields: function(event, data)
         {
             var me = this;
+	        me._updatePreviousValues();
             var sFormPath = data.form_path;
             var sUpdateUrl = GetAbsoluteUrlAppRoot()+'pages/ajax.render.php';
 
@@ -64,7 +63,6 @@ $(function()
                 {
                     operation: 'custom_fields_update',
                     attcode: this.options.custom_field_attcode,
-                    //current_values: this.getCurrentValues(),
                     requested_fields: data.requested_fields,
                     form_path: sFormPath,
                     json_obj: this.options.oWizardHelper.UpdateWizardToJSON()
@@ -85,6 +83,7 @@ $(function()
                         me.element.find('.last-error').text(data.error);
                     }
                     me._onUpdateAlways(data, sFormPath);
+	                me.element.find('[data-field-id="previous_values"]').find('input[type="hidden"]').val('{}');
                 });
         },
         // On initialization or update
diff --git a/js/form_handler.js b/js/form_handler.js
index c709c5e43..64f761c07 100644
--- a/js/form_handler.js
+++ b/js/form_handler.js
@@ -92,12 +92,24 @@ $(function()
 		{
 			return this.options.field_set.triggerHandler('get_current_values');
 		},
-
+		//since 3.0.2 3.1.0
+		_updatePreviousValues: function()
+		{
+			let me = this;
+			if(this.element.find('[data-attribute-previous-value]').length>0) {
+				let aPreviousValues = {};
+				$(this.element.find('[data-attribute-previous-value]')).each(function (idx, elt) {
+					aPreviousValues[$(elt).data('field-id')] = $(elt).data('attribute-previous-value');
+				});
+				me.element.find('[data-field-id="previous_values"]').find('input[type="hidden"]').val(JSON.stringify(aPreviousValues));
+			}
+		},
 		// Events callback
 		// - Update fields depending on the update ones
 		_onUpdateFields: function(oEvent, oData)
 		{
 			var me = this;
+			me._updatePreviousValues();
 			var sFormPath = oData.form_path;
 
 			// Data checks
diff --git a/pages/UI.php b/pages/UI.php
index d479ea8bc..7a79afe18 100644
--- a/pages/UI.php
+++ b/pages/UI.php
@@ -1481,7 +1481,10 @@ EOF
 								}
 								else
 								{
-									$sError = '<p>'.implode('</p></p>',$aErrors)."</p>\n";
+									$aErrorsToDisplay = array_map(function($sError) {
+										return utils::HtmlEntities($sError);
+									}, $aErrors);
+									$sError = '<p>'.implode('</p></p>',$aErrorsToDisplay)."</p>\n";
 								}
 							}
 							else
diff --git a/sources/Renderer/Console/FieldRenderer/ConsoleSimpleFieldRenderer.php b/sources/Renderer/Console/FieldRenderer/ConsoleSimpleFieldRenderer.php
index 985a2ee88..a8469a20c 100644
--- a/sources/Renderer/Console/FieldRenderer/ConsoleSimpleFieldRenderer.php
+++ b/sources/Renderer/Console/FieldRenderer/ConsoleSimpleFieldRenderer.php
@@ -25,6 +25,7 @@ use AttributeDuration;
 use Combodo\iTop\Application\Helper\WebResourcesHelper;
 use Combodo\iTop\Application\UI\Base\Component\Field\FieldUIBlockFactory;
 use Combodo\iTop\Application\UI\Base\Component\Html\Html;
+use Combodo\iTop\Application\UI\Base\Component\Html\HtmlFactory;
 use Combodo\iTop\Application\UI\Base\Component\Input\InputUIBlockFactory;
 use Combodo\iTop\Application\UI\Base\Component\Input\Select\SelectOptionUIBlockFactory;
 use Combodo\iTop\Application\UI\Base\Component\Input\SelectUIBlockFactory;
@@ -110,15 +111,17 @@ class ConsoleSimpleFieldRenderer extends FieldRenderer
 
 					$bRichEditor = ($this->oField->GetFormat() === TextAreaField::ENUM_FORMAT_HTML);
 
-					$oText = new TextArea("",$this->oField->GetCurrentValue(),$this->oField->GetGlobalId(),40,8);
-					$oText->AddCSSClass('ibo-input-field-wrapper ibo-input');
-					$oValue->AddSubBlock($oText);
+
 					if ($this->oField->GetReadOnly())
 					{
-						$oText->SetIsDisabled(true);
+						$oValue->AddSubBlock(UIContentBlockUIBlockFactory::MakeStandard())->AddSubBlock(HtmlFactory::MakeHtmlContent($this->oField->GetCurrentValue()));
+						$oValue->AddSubBlock(InputUIBlockFactory::MakeForHidden("",$this->oField->GetCurrentValue(), $this->oField->GetGlobalId()));
 					}
 					else
 					{
+						$oText = new TextArea("",$this->oField->GetCurrentValue(),$this->oField->GetGlobalId(),40,8);
+						$oText->AddCSSClasses(['ibo-input-field-wrapper', 'ibo-input']);
+						$oValue->AddSubBlock($oText);
 						// Some additional stuff if we are displaying it with a rich editor
 						if ($bRichEditor)
 						{