diff --git a/packages/df-wiki-cli/df_wiki_cli/content/main.py b/packages/df-wiki-cli/df_wiki_cli/content/main.py
index 214ccec9d90f214dd5f33c03e05ac590a7fe63ab..9075e42181a914120863c1e19e6c790032db04a9 100644
--- a/packages/df-wiki-cli/df_wiki_cli/content/main.py
+++ b/packages/df-wiki-cli/df_wiki_cli/content/main.py
@@ -178,6 +178,8 @@ def systems(
     with open(pfam, "r") as pf:
         pfam_df = pd.read_csv(pf, index_col="AC", keep_default_na=False)
         systems = []
+        if (output.exists()):
+            output.unlink()
         with open(output, "a") as ty:
             for file in dir.iterdir():
                 if file.suffix == ".md":