diff --git a/api/src/Db/Backup.php b/api/src/Db/Backup.php
index e84e12484c..18ff21fb11 100644
--- a/api/src/Db/Backup.php
+++ b/api/src/Db/Backup.php
@@ -765,7 +765,10 @@ class Backup
 				// decode bool columns, they might be 't'/'f' for old PostgreSQL backups
 				foreach($bools as $key)
 				{
-					$fields[$key] = Api\Db::from_bool($fields[$key]);
+					if (isset($fields[$key]))	// do NOT replace NULL with false/0
+					{
+						$fields[$key] = Api\Db::from_bool($fields[$key]);
+					}
 				}
 			}
 			return $fields;
@@ -797,7 +800,7 @@ class Backup
 			{
 				$arr[$key] = base64_decode($field);
 			}
-			elseif (in_array($key, $bools))
+			elseif ($field !== 'NULL' && in_array($key, $bools))
 			{
 				$arr[$key] = Api\Db::from_bool($field);
 			}
diff --git a/infolog/setup/setup.inc.php b/infolog/setup/setup.inc.php
index d3e2278508..fe75692d8b 100644
--- a/infolog/setup/setup.inc.php
+++ b/infolog/setup/setup.inc.php
@@ -11,7 +11,7 @@
  */
 
 $setup_info['infolog']['name']      = 'infolog';
-$setup_info['infolog']['version']   = '19.1';
+$setup_info['infolog']['version']   = '19.1.001';
 $setup_info['infolog']['app_order'] = 5;
 $setup_info['infolog']['tables']    = array('egw_infolog','egw_infolog_extra','egw_infolog_users');
 $setup_info['infolog']['enable']    = 1;
diff --git a/infolog/setup/tables_update.inc.php b/infolog/setup/tables_update.inc.php
index 08257d812a..3561b75a0f 100644
--- a/infolog/setup/tables_update.inc.php
+++ b/infolog/setup/tables_update.inc.php
@@ -1108,3 +1108,16 @@ function infolog_upgrade17_1_001()
 {
 	return $GLOBALS['setup_info']['infolog']['currentver'] = '19.1';
 }
+
+/**
+ * Fix egw_infolog_users.info_res_deleted=0 --> NULL
+ *
+ * @return string
+ */
+function infolog_upgrade19_1()
+{
+	$GLOBALS['egw_setup']->db->query("UPDATE egw_infolog_users SET info_res_deleted=NULL WHERE info_res_deleted=".
+		$GLOBALS['egw_setup']->db->quote(false, 'bool'));
+
+	return $GLOBALS['setup_info']['infolog']['currentver'] = '19.1.001';
+}