diff --git a/proton b/proton
index 2ba94cf1..05ade57f 100755
--- a/proton
+++ b/proton
@@ -653,6 +653,8 @@ class CompatData:
                 path = self.prefix_dir + "/drive_c/Program Files (x86)/Ubisoft/Ubisoft Game Launcher/version.txt"
                 if file_exists(path, follow_symlinks=False) and os.path.isfile(path):
                     os.remove(path)
+                if file_exists(self.creation_sync_guard, follow_symlinks=False):
+                    os.remove(self.creation_sync_guard)
                 return
 
             if old_proton_ver == "3.7" and old_prefix_ver == "1":