diff --git a/bor/client/cli/query.go b/bor/client/cli/query.go
index b75e44760..62f9565e5 100644
--- a/bor/client/cli/query.go
+++ b/bor/client/cli/query.go
@@ -269,7 +269,7 @@ func GetNextSpanSeed(cdc *codec.Codec) *cobra.Command {
 	return cmd
 }
 
-// PostSendProposeSpanTx send propose span transaction
+// GetPreparedProposeSpan generates a propose span transaction
 func GetPreparedProposeSpan(cdc *codec.Codec) *cobra.Command {
 	cmd := &cobra.Command{
 		Use:   "propose-span",
diff --git a/bor/handler.go b/bor/handler.go
index 8684197a4..43c9d8f98 100644
--- a/bor/handler.go
+++ b/bor/handler.go
@@ -1,12 +1,14 @@
 package bor
 
 import (
+	"errors"
 	"strconv"
 
 	sdk "github.com/cosmos/cosmos-sdk/types"
 
 	"github.com/maticnetwork/heimdall/bor/types"
 	"github.com/maticnetwork/heimdall/common"
+	"github.com/maticnetwork/heimdall/helper"
 )
 
 // NewHandler returns a handler for "bor" type messages.
@@ -29,6 +31,11 @@ func HandleMsgProposeSpan(ctx sdk.Context, msg sdk.Msg, k Keeper) sdk.Result {
 	var proposeMsg types.MsgProposeSpanV2
 	switch msg := msg.(type) {
 	case types.MsgProposeSpan:
+		if ctx.BlockHeight() >= helper.GetAntevortaHeight() {
+			err := errors.New("msg span is not allowed after Antevorta hardfork height")
+			k.Logger(ctx).Error(err.Error())
+			return sdk.ErrTxDecode(err.Error()).Result()
+		}
 		proposeMsg = types.MsgProposeSpanV2{
 			ID:         msg.ID,
 			Proposer:   msg.Proposer,
@@ -38,10 +45,16 @@ func HandleMsgProposeSpan(ctx sdk.Context, msg sdk.Msg, k Keeper) sdk.Result {
 			Seed:       msg.Seed,
 		}
 	case types.MsgProposeSpanV2:
+		if ctx.BlockHeight() < helper.GetAntevortaHeight() {
+			err := errors.New("msg span v2 is not allowed before Antevorta hardfork height")
+			k.Logger(ctx).Error(err.Error())
+			return sdk.ErrTxDecode(err.Error()).Result()
+		}
 		proposeMsg = msg
 	}
 
 	k.Logger(ctx).Debug("✅ Validating proposed span msg",
+		"proposer", proposeMsg.Proposer.String(),
 		"spanId", proposeMsg.ID,
 		"startBlock", proposeMsg.StartBlock,
 		"endBlock", proposeMsg.EndBlock,
diff --git a/bor/side_handler.go b/bor/side_handler.go
index 427acda1d..16990dc96 100644
--- a/bor/side_handler.go
+++ b/bor/side_handler.go
@@ -53,6 +53,10 @@ func SideHandleMsgSpan(ctx sdk.Context, k Keeper, msg sdk.Msg, contractCaller he
 	var proposeMsg types.MsgProposeSpanV2
 	switch msg := msg.(type) {
 	case types.MsgProposeSpan:
+		if ctx.BlockHeight() >= helper.GetAntevortaHeight() {
+			k.Logger(ctx).Error("Msg span is not allowed after Antevorta hardfork height")
+			return hmCommon.ErrorSideTx(k.Codespace(), common.CodeInvalidMsg)
+		}
 		proposeMsg = types.MsgProposeSpanV2{
 			ID:         msg.ID,
 			Proposer:   msg.Proposer,
@@ -62,6 +66,10 @@ func SideHandleMsgSpan(ctx sdk.Context, k Keeper, msg sdk.Msg, contractCaller he
 			Seed:       msg.Seed,
 		}
 	case types.MsgProposeSpanV2:
+		if ctx.BlockHeight() < helper.GetAntevortaHeight() {
+			k.Logger(ctx).Error("Msg span v2 is not allowed before Antevorta hardfork height")
+			return hmCommon.ErrorSideTx(k.Codespace(), common.CodeInvalidMsg)
+		}
 		proposeMsg = msg
 	}
 
@@ -80,6 +88,8 @@ func SideHandleMsgSpan(ctx sdk.Context, k Keeper, msg sdk.Msg, contractCaller he
 	if !bytes.Equal(proposeMsg.Seed.Bytes(), seed.Bytes()) {
 		k.Logger(ctx).Error(
 			"Span Seed does not match",
+			"proposer", proposeMsg.Proposer.String(),
+			"chainID", proposeMsg.ChainID,
 			"msgSeed", proposeMsg.Seed.String(),
 			"mainchainSeed", seed.String(),
 		)
@@ -92,6 +102,8 @@ func SideHandleMsgSpan(ctx sdk.Context, k Keeper, msg sdk.Msg, contractCaller he
 		if !bytes.Equal(proposeMsg.SeedAuthor.Bytes(), seedAuthor.Bytes()) {
 			k.Logger(ctx).Error(
 				"Span Seed Author does not match",
+				"proposer", proposeMsg.Proposer.String(),
+				"chainID", proposeMsg.ChainID,
 				"msgSeed", proposeMsg.Seed.String(),
 				"msgSeedAuthor", proposeMsg.SeedAuthor.String(),
 				"mainchainSeedAuthor", seedAuthor.String(),
@@ -167,7 +179,14 @@ func PostHandleMsgEventSpan(ctx sdk.Context, k Keeper, msg sdk.Msg, sideTxResult
 		return hmCommon.ErrOldTx(k.Codespace()).Result()
 	}
 
-	logger.Debug("Persisting span state", "sideTxResult", sideTxResult)
+	logger.Debug("Persisting span state",
+		"sideTxResult", sideTxResult,
+		"proposer", proposeMsg.Proposer.String(),
+		"spanId", proposeMsg.ID,
+		"startBlock", proposeMsg.StartBlock,
+		"endBlock", proposeMsg.EndBlock,
+		"seed", proposeMsg.Seed.String(),
+	)
 
 	if ctx.BlockHeader().Height >= helper.GetJorvikHeight() {
 		var seedSpanID uint64
diff --git a/helper/config.go b/helper/config.go
index e426668ab..8aa56f7b4 100644
--- a/helper/config.go
+++ b/helper/config.go
@@ -435,8 +435,8 @@ func InitHeimdallConfigWith(homeDir string, heimdallConfigFileFromFLag string) {
 		spanOverrideHeight = 0
 		newHexToStringAlgoHeight = 0
 		aalborgHeight = 0
-		jorvikHeight = 100
-		antevortaHeight = 150
+		jorvikHeight = 0
+		antevortaHeight = 0
 	}
 }