diff --git a/.github/rm-invalid-lowest-lock-files.php b/.github/rm-invalid-lowest-lock-files.php
index c714632621..3105942a09 100644
--- a/.github/rm-invalid-lowest-lock-files.php
+++ b/.github/rm-invalid-lowest-lock-files.php
@@ -79,7 +79,7 @@ foreach ($composerJsons as list($dir, $lockedPackages)) {
             continue 2;
         }
 
-        if (isset($composerJsons[$name][2]['repositories']) && !isset($lockedJson[$key]['repositories'])) {
+        if (isset($composerJsons[$name][2]['repositories']) && !isset($lockedJson['repositories'])) {
             // the locked package has been patched locally but the lock references a commit,
             // which means the referencing package itself is not modified
             continue;