diff --git a/base_layer/core/src/chain_storage/blockchain_database.rs b/base_layer/core/src/chain_storage/blockchain_database.rs
index f4e7ceae32..27ee918545 100644
--- a/base_layer/core/src/chain_storage/blockchain_database.rs
+++ b/base_layer/core/src/chain_storage/blockchain_database.rs
@@ -1258,11 +1258,11 @@ pub fn calculate_mmr_roots<T: BlockchainBackend>(db: &T, block: &Block) -> Resul
     let mut output_mmr = MutableMmr::<Blake256, _>::new(outputs, deleted)?;
     let mut witness_mmr = MerkleMountainRange::<Blake256, _>::new(range_proofs);
     let mut input_mmr = MerkleMountainRange::<Blake256, _>::new(PrunedHashSet::default());
+    let mut deleted_outputs = Vec::new();
 
     for kernel in body.kernels().iter() {
         kernel_mmr.push(kernel.hash())?;
     }
-    let mut deleted_outputs = Vec::new();
 
     for output in body.outputs().iter() {
         let output_hash = output.hash();
@@ -1308,7 +1308,7 @@ pub fn calculate_mmr_roots<T: BlockchainBackend>(db: &T, block: &Block) -> Resul
         };
         deleted_outputs.push((index, output_hash));
     }
-    for (index, output_hash) in deleted_outputs.into_iter() {
+    for (index, output_hash) in deleted_outputs {
         if !output_mmr.delete(index) {
             let num_leaves = u32::try_from(output_mmr.get_leaf_count())
                 .map_err(|_| ChainStorageError::CriticalError("UTXO MMR leaf count overflows u32".to_string()))?;
@@ -1318,7 +1318,6 @@ pub fn calculate_mmr_roots<T: BlockchainBackend>(db: &T, block: &Block) -> Resul
                     output_hash.to_hex()
                 )));
             }
-
             return Err(ChainStorageError::InvalidOperation(format!(
                 "Could not delete index {} from the output MMR ({} leaves)",
                 index, num_leaves