diff --git a/web/clitools/unatantum/updInsertTS.php b/web/clitools/unatantum/updInsertTS.php
new file mode 100644
index 0000000..ed120cf
--- /dev/null
+++ b/web/clitools/unatantum/updInsertTS.php
@@ -0,0 +1,126 @@
+#!/usr/bin/php
+<?php
+
+/*
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+define('N',"\n");
+define('SNAME',basename(__FILE__));
+define('CONFIGFP',__DIR__.'/../../conf/mustard.ini');
+
+$help='SYNOPSYS
+ '.SNAME.' [options]
+DESCRIPTION
+  This is a script to set the «InsertTS» field of «Instances» table for
+ instances which where checked the first time when «InsertTS» was not
+ implented yet.
+OPTIONS
+ -h, --help
+  Show this help text and exit.'.N;
+
+for ($i=1; $i<$argc; $i++) {
+	if ($argv[$i]=='-h' || $argv[$i]=='--help') {
+		mexit($help,0);
+	} else {
+		mexit('Don’t know how to interpret «'.$argv[$i].'», please read the help text using «-h» or «--help» option.'.N,1);
+	}
+}
+
+use function mysqli_real_escape_string as myesc;
+
+$iniarr=@parse_ini_file(CONFIGFP)
+	or mexit('Could not open config file «'.CONFIGFP.'».'.N,1);
+
+try { $link=@mysqli_connect($iniarr['db_host'],$iniarr['db_admin_name'],$iniarr['db_admin_password'],$iniarr['db_name'],$iniarr['db_port'],$iniarr['db_socket']); }
+catch (Exception $error) { mexit('could not connect to MySQL server: '.mysqli_connect_error().'.'.N,1,true); }
+// for php versions < 8
+if ($link===false) mexit('could not connect to MySQL server: '.mysqli_connect_error().'.'.N,1,true);
+try { $res=mysqli_set_charset($link,'utf8mb4'); }
+catch (Exception $error) { mexit('could not set «utf8mb4» charset for MySQL: '.mysqli_error($link).'.'.N,1,true); }
+// for php versions < 8
+if ($res===false) mexit('could not set MySQL charset: '.mysqli_errno($link).': '.mysqli_error($link).'.'.N,1,true);
+
+$insts=[];
+$res=myq($link,'SELECT * FROM Instances WHERE InsertTS IS NULL');
+while ($row=mysqli_fetch_assoc($res)) $insts[]=$row;
+$cinsts=count($insts);
+$i=0;
+$now=time();
+$duemilasedici=mktime(0,0,0,1,1,2016);
+foreach ($insts as $inst) {
+	$i++;
+	echo('Working on instance '.$i.'/'.$cinsts.' ('.round(100/$cinsts*$i,2).'%) with ID = '.$inst['ID'].' and URI = «'.$inst['URI'].'».'.N);
+	$insertts=null;
+	if (!is_null($inst['FirstSeen'])) {
+		echo('«FirstSeen» is not null: '.$inst['FirstSeen'].'; using it.'.N);
+		$insertts=$inst['FirstSeen'];
+	} elseif (!is_null($inst['AdmCreatedAt'])) {
+		echo('«AdmCreatedAt» is not null: '.$inst['AdmCreatedAt'].'; using it.'.N);
+		$insertts=round($inst['AdmCreatedAt']);
+	} else {
+		echo('Could not guess a value for «InsertTS», using 2016.'.N);
+		$insertts=$duemilasedici;
+	}
+	myq($link,'UPDATE Instances SET InsertTS=\''.$insertts.'\' WHERE ID='.$inst['ID']);
+	echo('Updated InsertTS :-)'.N.'---'.N);
+}
+mysqli_close($link);
+echo('Done updating '.$cinsts.' «Instances» records :-).'.N);
+exit(0);
+
+
+// functions
+
+function myq(&$l,$q) {
+	try {
+		$res=mysqli_query($l,$q);
+	}
+	catch (Exception $e) {
+		echo('query «'.$q.'» failed: '.$e->getMessage().' (error code: '.$e->getCode().').'.N);
+		exit(3);
+	}
+	if ($res===false) {
+		echo('query «'.$q.'» failed: '.mysqli_errno($l).': '.mysqli_error($l).'.'.N);
+		exit(3);
+	}
+	return($res);
+}
+
+function mexit($msg,$code) {
+	global $link;
+	if (isset($link) && $link!==false) mysqli_close($link);
+	if ($code>0)
+		fwrite(STDERR,$msg);
+	else
+		echo($msg);
+	exit($code);
+}
+
+function utstd($val) {
+	if (is_null($val)) return(null);
+	$val=round($val);
+	return(date('Y-m-d H:i:s',$val));
+}
+
+function pr($val) {
+	if (is_null($val)) return('NULL');
+	return($val);
+}
+
+function eecho($msg) {
+	echo($msg);
+}
+
+?>