fix(case): log warning instead of throw exception (#5604)

src/dispatch/case/messaging.py

@@ -341,9 +341,9 @@ def send_case_welcome_participant_message(
         "assignee_fullname": case.assignee.individual.name,
         "assignee_team": case.assignee.team,
         "assignee_weblink": case.assignee.individual.weblink,
-        "reporter_fullname": case.reporter.individual.name,
-        "reporter_team": case.reporter.team,
-        "reporter_weblink": case.reporter.individual.weblink,
+        "reporter_fullname": case.reporter.individual.name if case.reporter else None,
+        "reporter_team": case.reporter.team if case.reporter else None,
+        "reporter_weblink": case.reporter.individual.weblink if case.reporter else None,
         "document_weblink": resolve_attr(case, "case_document.weblink"),
         "storage_weblink": resolve_attr(case, "storage.weblink"),
         "ticket_weblink": resolve_attr(case, "ticket.weblink"),

src/dispatch/conversation/flows.py

@@ -49,9 +49,15 @@ def create_case_conversation(
     # Do not overwrite a case conversation with one of the same type (thread, channel)
     if case.conversation:
         if case.has_channel:
-            raise RuntimeError("Case already has a dedicated channel conversation.")
+            log.warning(
+                f"Trying to create case conversation but case {case.id} already has a dedicated channel conversation."
+            )
+            return
         if case.has_thread and not case.dedicated_channel:
-            raise RuntimeError("Case already has a thread conversation.")
+            log.warning(
+                "Trying to create case conversation but case {case.id} already has a thread conversation."
+            )
+            return
 
     # This case is a thread version, we send a new messaged (threaded) to the conversation target
     # for the configured case type