diff --git a/api/protocols.php b/api/protocols.php
index 224f193..ac3e179 100644
--- a/api/protocols.php
+++ b/api/protocols.php
@@ -140,6 +140,9 @@ $protocol->standort          = isset($p['location']) ? (string) $p['location'] :
 $protocol->subnet            = isset($p['subnet']) ? (string) $p['subnet'] : '';
 $protocol->status            = isset($p['status']) ? (int) $p['status'] : NetDiagProtocol::STATUS_DRAFT;
 $protocol->note              = isset($p['note']) ? (string) $p['note'] : '';
+// tms explizit setzen — die Spalte ist NOT NULL ohne brauchbaren NULL-Default
+// (explicit_defaults_for_timestamp=1), createCommon würde sonst NULL einfügen.
+$protocol->tms               = dol_now();
 
 if ($exists > 0) {
 	$result = $protocol->update($user, 1);
@@ -168,6 +171,7 @@ foreach ($devicesIn as $d) {
 	$dev->vendor      = isset($d['vendor']) ? (string) $d['vendor'] : '';
 	$dev->devicetype  = isset($d['deviceType']) ? (string) $d['deviceType'] : '';
 	$dev->note        = isset($d['note']) ? (string) $d['note'] : '';
+	$dev->tms         = dol_now();
 	if ($dev->create($user, 1) <= 0) {
 		$db->rollback();
 		netdiag_api_error('Gerät speichern fehlgeschlagen: '.$dev->error, 500);
@@ -191,6 +195,7 @@ foreach ($measIn as $m) {
 	$meas->result        = isset($m['result']) ? json_encode($m['result'], JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES) : null;
 	$meas->measure_status = isset($m['measureStatus']) ? (int) $m['measureStatus'] : 0;
 	$meas->date_measure  = !empty($m['dateMeasure']) ? (int) $m['dateMeasure'] : dol_now();
+	$meas->tms           = dol_now();
 	if ($meas->create($user, 1) <= 0) {
 		$db->rollback();
 		netdiag_api_error('Messung speichern fehlgeschlagen: '.$meas->error, 500);