diff --git a/samples/mpscore/solutions/jetbrains.mps.baseLanguage.collectionsExt.test/models/jetbrains.mps.baseLanguage.collectionsExt.test.sequence.mps b/samples/mpscore/solutions/jetbrains.mps.baseLanguage.collectionsExt.test/models/jetbrains.mps.baseLanguage.collectionsExt.test.sequence.mps
index 99077d49..e0c0e5b4 100644
--- a/samples/mpscore/solutions/jetbrains.mps.baseLanguage.collectionsExt.test/models/jetbrains.mps.baseLanguage.collectionsExt.test.sequence.mps
+++ b/samples/mpscore/solutions/jetbrains.mps.baseLanguage.collectionsExt.test/models/jetbrains.mps.baseLanguage.collectionsExt.test.sequence.mps
@@ -294,9 +294,6 @@
             <node concept="37vLTw" id="3MFPGC52fMD" role="33vP2m">
               <ref role="3cqZAo" node="3MFPGC52fNr" resolve="rawIt" />
             </node>
-            <node concept="1U20sH" id="4NtT$ZxGS1V" role="lGtFl">
-              <property role="1U20sK" value="error" />
-            </node>
           </node>
         </node>
         <node concept="3SKdUt" id="3MFPGC52fME" role="3cqZAp">
@@ -340,9 +337,6 @@
             <node concept="37vLTw" id="3MFPGC52rtA" role="33vP2m">
               <ref role="3cqZAo" node="3MFPGC52fNw" resolve="bs" />
             </node>
-            <node concept="1U20sH" id="4NtT$ZxGSj9" role="lGtFl">
-              <property role="1U20sK" value="error" />
-            </node>
           </node>
         </node>
         <node concept="3cpWs8" id="3MFPGC52fMU" role="3cqZAp">