diff --git a/core/rawdb/accessors_chain_zkevm.go b/core/rawdb/accessors_chain_zkevm.go
index 9d3be52e1b8..8742b917b48 100644
--- a/core/rawdb/accessors_chain_zkevm.go
+++ b/core/rawdb/accessors_chain_zkevm.go
@@ -11,6 +11,15 @@ import (
 	"github.com/ledgerwatch/erigon/rlp"
 )
 
+func DeleteCumulativeGasUsed(tx kv.RwTx, blockFrom uint64) error {
+	if err := tx.ForEach(kv.CumulativeGasIndex, hexutility.EncodeTs(blockFrom), func(k, v []byte) error {
+		return tx.Delete(kv.CumulativeGasIndex, k)
+	}); err != nil {
+		return fmt.Errorf("TruncateCanonicalHash: %w", err)
+	}
+	return nil
+}
+
 func DeleteTransactions(db kv.RwTx, txsCount, baseTxId uint64, blockHash *libcommon.Hash) error {
 	for id := baseTxId; id < baseTxId+txsCount; id++ {
 		txIdKey := make([]byte, 8)
diff --git a/eth/stagedsync/stage_cumulative_index.go b/eth/stagedsync/stage_cumulative_index.go
index 231f6bac6c5..d310d9d409e 100644
--- a/eth/stagedsync/stage_cumulative_index.go
+++ b/eth/stagedsync/stage_cumulative_index.go
@@ -48,12 +48,13 @@ func SpawnStageCumulativeIndex(cfg CumulativeIndexCfg, s *StageState, tx kv.RwTx
 	logEvery := time.NewTicker(logInterval)
 	defer logEvery.Stop()
 
-	headNumber, err := stages.GetStageProgress(tx, stages.Headers)
+	// we can do this till the last block executed, since we get gas used from there
+	executeProgress, err := stages.GetStageProgress(tx, stages.Execution)
 	if err != nil {
-		return fmt.Errorf("getting bodies progress: %w", err)
+		return fmt.Errorf("getting progress: %w", err)
 	}
 	// If we are done already, we can exit the stage
-	if s.BlockNumber == headNumber {
+	if s.BlockNumber == executeProgress {
 		log.Info(fmt.Sprintf("[%s] Nothing new to process", logPrefix))
 		return nil
 	}
@@ -69,8 +70,8 @@ func SpawnStageCumulativeIndex(cfg CumulativeIndexCfg, s *StageState, tx kv.RwTx
 		return err
 	}
 
-	currentBlockNumber := s.BlockNumber + 1
-	for k, v, err := headerC.Seek(hexutility.EncodeTs(s.BlockNumber)); k != nil; k, v, err = headerC.Next() {
+	currentBlockNumber := s.BlockNumber
+	for k, v, err := headerC.Seek(hexutility.EncodeTs(s.BlockNumber + 1)); k != nil; k, v, err = headerC.Next() {
 		if err != nil {
 			return err
 		}
@@ -79,6 +80,7 @@ func SpawnStageCumulativeIndex(cfg CumulativeIndexCfg, s *StageState, tx kv.RwTx
 			continue
 		}
 
+		blockHash := libcommon.BytesToHash(k[8:])
 		blockNumber, err := dbutils.DecodeBlockNumber(k[:8])
 		if err != nil {
 			return err
@@ -89,7 +91,7 @@ func SpawnStageCumulativeIndex(cfg CumulativeIndexCfg, s *StageState, tx kv.RwTx
 			return err
 		}
 
-		if canonicalHash != libcommon.BytesToHash(k[8:]) {
+		if canonicalHash != blockHash {
 			continue
 		}
 
@@ -99,7 +101,9 @@ func SpawnStageCumulativeIndex(cfg CumulativeIndexCfg, s *StageState, tx kv.RwTx
 		if err := rlp.Decode(bytes.NewReader(v), &header); err != nil {
 			return err
 		}
-		cumulativeGasUsed.Add(cumulativeGasUsed, big.NewInt(int64(header.GasUsed)))
+
+		blockGasUsedBig := new(big.Int).SetUint64(header.GasUsed)
+		cumulativeGasUsed.Add(cumulativeGasUsed, blockGasUsedBig)
 
 		if err := rawdb.WriteCumulativeGasUsed(tx, currentBlockNumber, cumulativeGasUsed); err != nil {
 			return err
@@ -137,6 +141,10 @@ func UnwindCumulativeIndexStage(u *UnwindState, cfg CumulativeIndexCfg, tx kv.Rw
 		defer tx.Rollback()
 	}
 
+	if err := rawdb.DeleteCumulativeGasUsed(tx, u.UnwindPoint); err != nil {
+		return fmt.Errorf("failed to delete cumulative gas used: %w", err)
+	}
+
 	if err = u.Done(tx); err != nil {
 		return fmt.Errorf(" reset: %w", err)
 	}
@@ -153,6 +161,14 @@ func UnwindCumulativeIndexStage(u *UnwindState, cfg CumulativeIndexCfg, tx kv.Rw
 func PruneCumulativeIndexStage(p *PruneState, tx kv.RwTx, ctx context.Context) (err error) {
 	useExternalTx := tx != nil
 
+	if err := rawdb.DeleteCumulativeGasUsed(tx, 0); err != nil {
+		return fmt.Errorf("failed to delete cumulative gas used: %w", err)
+	}
+
+	if err := p.Done(tx); err != nil {
+		return fmt.Errorf(" reset: %w", err)
+	}
+
 	if !useExternalTx {
 		if err = tx.Commit(); err != nil {
 			return err
diff --git a/zk/stages/stages.go b/zk/stages/stages.go
index e1648ed2e24..6168c9e7825 100644
--- a/zk/stages/stages.go
+++ b/zk/stages/stages.go
@@ -288,24 +288,6 @@ func DefaultZkStages(
 				return PruneBatchesStage(p, tx, batchesCfg, ctx)
 			},
 		},
-		{
-			/*
-			* FIXME: this stage doesn't work since the "headers" we have in the datastream don't have any gasUsed, it's always 0.
-			*
-			* to solve this we probably should move it after execution (execution doesn't depend on it) and update the unwinds.
-			**/
-			ID:          stages2.CumulativeIndex,
-			Description: "Write Cumulative Index",
-			Forward: func(firstCycle bool, badBlockUnwind bool, s *stages.StageState, u stages.Unwinder, tx kv.RwTx, quiet bool) error {
-				return stagedsync.SpawnStageCumulativeIndex(cumulativeIndex, s, tx, ctx)
-			},
-			Unwind: func(firstCycle bool, u *stages.UnwindState, s *stages.StageState, tx kv.RwTx) error {
-				return stagedsync.UnwindCumulativeIndexStage(u, cumulativeIndex, tx, ctx)
-			},
-			Prune: func(firstCycle bool, p *stages.PruneState, tx kv.RwTx) error {
-				return stagedsync.PruneCumulativeIndexStage(p, tx, ctx)
-			},
-		},
 		{
 			ID:          stages2.BlockHashes,
 			Description: "Write block hashes",
@@ -344,6 +326,18 @@ func DefaultZkStages(
 			Prune: func(firstCycle bool, p *stages.PruneState, tx kv.RwTx) error {
 				return stagedsync.PruneExecutionStageZk(p, tx, exec, ctx, firstCycle)
 			},
+		}, {
+			ID:          stages2.CumulativeIndex,
+			Description: "Write Cumulative Index",
+			Forward: func(firstCycle bool, badBlockUnwind bool, s *stages.StageState, u stages.Unwinder, tx kv.RwTx, quiet bool) error {
+				return stagedsync.SpawnStageCumulativeIndex(cumulativeIndex, s, tx, ctx)
+			},
+			Unwind: func(firstCycle bool, u *stages.UnwindState, s *stages.StageState, tx kv.RwTx) error {
+				return stagedsync.UnwindCumulativeIndexStage(u, cumulativeIndex, tx, ctx)
+			},
+			Prune: func(firstCycle bool, p *stages.PruneState, tx kv.RwTx) error {
+				return stagedsync.PruneCumulativeIndexStage(p, tx, ctx)
+			},
 		},
 		{
 			ID:          stages2.HashState,