diff --git a/web/modules/custom/migrate_leshed/src/Plugin/migrate/source/ProjetNode.php b/web/modules/custom/migrate_leshed/src/Plugin/migrate/source/ProjetNode.php
index 8413161..6df6521 100644
--- a/web/modules/custom/migrate_leshed/src/Plugin/migrate/source/ProjetNode.php
+++ b/web/modules/custom/migrate_leshed/src/Plugin/migrate/source/ProjetNode.php
@@ -188,7 +188,8 @@ final class ProjetNode extends Url {
     sort($entries, SORT_NATURAL | SORT_FLAG_CASE);
     $markdown = NULL;
     foreach ($entries as $entry) {
-      if (!is_file($dir . '/' . $entry) || !preg_match('/\.md$/i', $entry)) {
+      // Ignore ".back.md" backups of the pre-clean source text.
+      if (!is_file($dir . '/' . $entry) || !preg_match('/\.md$/i', $entry) || preg_match('/\.back\.md$/i', $entry)) {
         continue;
       }
       if (preg_match($preferred, $entry)) {