diff --git a/cmd/state/exec3/historical_trace_worker.go b/cmd/state/exec3/historical_trace_worker.go
index 315c2c10f74..8d784be41ea 100644
--- a/cmd/state/exec3/historical_trace_worker.go
+++ b/cmd/state/exec3/historical_trace_worker.go
@@ -23,6 +23,7 @@ import (
 	"sync/atomic"
 	"time"
 
+	"github.com/erigontech/erigon-lib/chain/networkname"
 	"golang.org/x/sync/errgroup"
 
 	"github.com/erigontech/erigon-lib/chain"
@@ -350,6 +351,9 @@ func CustomTraceMapReduce(fromBlock, toBlock uint64, consumer TraceConsumer, ctx
 	log.Info("[Receipt] batch start", "fromBlock", fromBlock, "toBlock", toBlock, "workers", cfg.Workers)
 	br := cfg.BlockReader
 	chainConfig := cfg.ChainConfig
+	if chainConfig.ChainName == networkname.Gnosis {
+		panic("gnosis consensus doesn't support parallel exec yet: https://github.com/erigontech/erigon/issues/12054")
+	}
 
 	txNumsReader := rawdbv3.TxNums.WithCustomReadTxNumFunc(freezeblocks.ReadTxNumFuncFromBlockReader(ctx, cfg.BlockReader))
 
diff --git a/eth/stagedsync/exec3.go b/eth/stagedsync/exec3.go
index d1e1efb49b3..89710facaae 100644
--- a/eth/stagedsync/exec3.go
+++ b/eth/stagedsync/exec3.go
@@ -27,6 +27,7 @@ import (
 	"sync/atomic"
 	"time"
 
+	"github.com/erigontech/erigon-lib/chain/networkname"
 	"github.com/erigontech/erigon-lib/common"
 	"github.com/erigontech/erigon-lib/common/cmp"
 	"github.com/erigontech/erigon-lib/common/dbg"
@@ -207,6 +208,9 @@ func ExecV3(ctx context.Context,
 ) error {
 	// TODO: e35 doesn't support parallel-exec yet
 	parallel = false //nolint
+	if parallel && cfg.chainConfig.ChainName == networkname.Gnosis {
+		panic("gnosis consensus doesn't support parallel exec yet: https://github.com/erigontech/erigon/issues/12054")
+	}
 
 	blockReader := cfg.blockReader
 	chainConfig := cfg.chainConfig