fix 479

Author: romeokienzler

terratorch/cli_tools.py

@@ -342,8 +342,9 @@ def setup(self, trainer: Trainer, pl_module: LightningModule, stage: str) -> Non
 
         # broadcast so that all ranks are in sync on future calls to .setup()
         self.already_saved = trainer.strategy.broadcast(self.already_saved)
-        # Copying config file to log dir
-        shutil.copyfile(self.config_path_original, self.config_path_new)
+        # Copying config file to log dir only if they are different files
+        if os.path.abspath(self.config_path_original) != os.path.abspath(self.config_path_new):
+            shutil.copyfile(self.config_path_original, self.config_path_new)
 
 class StateDictAwareModelCheckpoint(ModelCheckpoint):
     # necessary as we wish to have one model checkpoint with only state dict and one with standard lightning checkpoints