apply the same fixes for requestClipInsertion

src/timeline2/model/timelinemodel.cpp

@@ -611,7 +611,11 @@ bool TimelineModel::requestClipInsertion(const QString &binClipId, int trackId,
     bool res = false;
     ClipType type = ClipType::Unknown;
     if (KdenliveSettings::splitaudio()) {
-        std::shared_ptr<ProjectClip> master = pCore->projectItemModel()->getClipByBinID(binClipId.section(QLatin1Char('/'), 0, 0));
+        QString bid = binClipId.section(QLatin1Char('/'), 0, 0);
+        if (!pCore->projectItemModel()->hasClip(bid)) {
+            return false;
+        }
+        std::shared_ptr<ProjectClip> master = pCore->projectItemModel()->getClipByBinID(bid);
         type = master->clipType();
     }
     if (type == ClipType::AV) {

tests/modeltest.cpp

@@ -977,7 +977,7 @@ TEST_CASE("Undo and Redo", "[ClipModel]")
         };
         state1();
 
-        QString binId4 = binId3 + "#1#10";
+        QString binId4 = binId3 + "/1/10";
         int cid4;
         REQUIRE(timeline->requestClipInsertion(binId4, tid2, 17, cid4, true));