diff --git a/tools/finalization/finalize-sdk-rel.sh b/tools/finalization/finalize-sdk-rel.sh
index 1770860..ca2f20d 100755
--- a/tools/finalization/finalize-sdk-rel.sh
+++ b/tools/finalization/finalize-sdk-rel.sh
@@ -25,7 +25,9 @@
     apply_prerelease_sdk_hack
 
     # cts
-    echo "$FINAL_PLATFORM_VERSION" > "$top/cts/tests/tests/os/assets/platform_versions.txt"
+    if ! grep -q "${FINAL_PLATFORM_VERSION}" "$top/cts/tests/tests/os/assets/platform_versions.txt" ; then
+        echo ${FINAL_PLATFORM_VERSION} >> "$top/cts/tests/tests/os/assets/platform_versions.txt"
+    fi
     if [ "$FINAL_PLATFORM_CODENAME" != "$CURRENT_PLATFORM_CODENAME" ]; then
         echo "$CURRENT_PLATFORM_CODENAME" >> "./cts/tests/tests/os/assets/platform_versions.txt"
     fi