diff --git a/addon/src/ops.py b/addon/src/ops.py
index eebc22d..4c88b0c 100644
--- a/addon/src/ops.py
+++ b/addon/src/ops.py
@@ -312,7 +312,7 @@ class CT_OT_start_from(Operator):
     def execute(self, context):
         prefs = pref()
         if self.filepath:
-            if self.add:
+            if self.add and not already_present(self, prefs, self.filepath):
                 template = prefs.projects.add()
                 template.name = self.name if self.name else name_from_path(self.filepath)
                 template.path = self.filepath