diff --git a/pytorch_lightning/trainer/progress.py b/pytorch_lightning/trainer/progress.py
index bcd2426da3e6a..8085bb7d2f75a 100644
--- a/pytorch_lightning/trainer/progress.py
+++ b/pytorch_lightning/trainer/progress.py
@@ -193,7 +193,6 @@ def optimizer_steps(self) -> int:
 
     def reset_on_epoch(self) -> None:
         self.optimizer.reset_on_epoch()
-        self.optimizer_idx = 0
 
     def load_state_dict(self, state_dict: dict) -> None:
         self.optimizer.load_state_dict(state_dict["optimizer"])