diff --git a/src/Meshing/Mage.py b/src/Meshing/Mage.py
index 292b76eb..90f56e0b 100644
--- a/src/Meshing/Mage.py
+++ b/src/Meshing/Mage.py
@@ -316,5 +316,7 @@ class MeshingWithMageMailleurTT(AMeshingTool):
         return tmp_st
 
     def import_m_file(self, reach, m):
+        reach.purge()
+
         logger.debug(f"meshing: Import geometry from {m}")
         reach.import_geometry(m)