diff --git a/modules/helpdesk/lib/Module/Helpdesk/Service/TicketCommunicationService.php b/modules/helpdesk/lib/Module/Helpdesk/Service/TicketCommunicationService.php
index b946199..34c4fc0 100644
--- a/modules/helpdesk/lib/Module/Helpdesk/Service/TicketCommunicationService.php
+++ b/modules/helpdesk/lib/Module/Helpdesk/Service/TicketCommunicationService.php
@@ -65,6 +65,16 @@ class TicketCommunicationService
             $odataEntries = $this->mapODataEntries($ticketNo, $ticketLog, $soapMessageMap);
         }
 
+        // When OData entries are enriched with SOAP message text via soapMessageMap,
+        // the separate SOAP entries for those messages are redundant and cause
+        // duplicates. Drop SOAP message entries when the map was applied.
+        if ($soapMessageMap !== [] && $soapEntries !== []) {
+            $soapEntries = array_values(array_filter(
+                $soapEntries,
+                static fn (array $e): bool => ($e['type_variant'] ?? '') !== 'message'
+            ));
+        }
+
         if ($actorNameMap !== []) {
             $odataEntries = $this->applyActorNameMap($odataEntries, $actorNameMap);
             $soapEntries = $this->applyActorNameMap($soapEntries, $actorNameMap);