diff --git a/polkadot/zombienet_tests/functional/0014-chunk-fetching-network-compatibility.toml b/polkadot/zombienet_tests/functional/0014-chunk-fetching-network-compatibility.toml
index 881abab64fd0..874b8a09bb24 100644
--- a/polkadot/zombienet_tests/functional/0014-chunk-fetching-network-compatibility.toml
+++ b/polkadot/zombienet_tests/functional/0014-chunk-fetching-network-compatibility.toml
@@ -42,7 +42,8 @@ chain = "glutton-westend-local-{{id}}"
 
     [parachains.collator]
     name = "collator"
-    image = "{{CUMULUS_IMAGE}}"
+    # Use an old image that does not send out v2 receipts, as the old validators will still check the collator signatures.
+    image = "docker.io/paritypr/polkadot-parachain-debug:master-bde0bbe5"
     args = ["-lparachain=debug"]
 
 {% endfor %}
diff --git a/prdoc/pr_6988.prdoc b/prdoc/pr_6988.prdoc
new file mode 100644
index 000000000000..18f70f9fd97f
--- /dev/null
+++ b/prdoc/pr_6988.prdoc
@@ -0,0 +1,5 @@
+doc: []
+
+crates:
+  - name: polkadot
+    bump: none
\ No newline at end of file