diff --git a/builder/files/genesis-mainnet-v1.json b/builder/files/genesis-mainnet-v1.json
index a5b96140ca..d3f0d02206 100644
--- a/builder/files/genesis-mainnet-v1.json
+++ b/builder/files/genesis-mainnet-v1.json
@@ -15,17 +15,14 @@
     "londonBlock": 23850000,
     "bor": {
       "jaipurBlock": 23850000,
-      "delhiBlock":  36499456,
       "period": {
         "0": 2
       },
       "producerDelay": {
-        "0": 6,
-        "36499456": 4
+        "0": 6
       },
       "sprint": {
-        "0": 64,
-        "36499456": 16
+        "0": 64
       },
       "backupMultiplier": {
         "0": 2
diff --git a/builder/files/genesis-testnet-v4.json b/builder/files/genesis-testnet-v4.json
index 41c6b072d1..8a0af45088 100644
--- a/builder/files/genesis-testnet-v4.json
+++ b/builder/files/genesis-testnet-v4.json
@@ -15,24 +15,19 @@
     "londonBlock": 22640000,
     "bor": {
       "jaipurBlock": 22770000,
-      "delhiBlock":  29389056,
       "period": {
         "0": 2,
-        "25275000": 5,
-        "29389056": 2
+        "25275000": 5
       },
       "producerDelay": {
-        "0": 6,
-        "29389056": 4
+        "0": 6
       },
       "sprint": {
-        "0": 64,
-        "29389056": 16
+        "0": 64
       },
       "backupMultiplier": {
         "0": 2,
-        "25275000": 5,
-        "29389056": 2
+        "25275000": 5
       },
       "validatorContract": "0x0000000000000000000000000000000000001000",
       "stateReceiverContract": "0x0000000000000000000000000000000000001001",
diff --git a/internal/cli/server/chains/mainnet.go b/internal/cli/server/chains/mainnet.go
index 8b75039f1a..7aee9cd606 100644
--- a/internal/cli/server/chains/mainnet.go
+++ b/internal/cli/server/chains/mainnet.go
@@ -30,17 +30,14 @@ var mainnetBor = &Chain{
 			LondonBlock:         big.NewInt(23850000),
 			Bor: &params.BorConfig{
 				JaipurBlock: big.NewInt(23850000),
-				DelhiBlock:  big.NewInt(36499456),
 				Period: map[string]uint64{
 					"0": 2,
 				},
 				ProducerDelay: map[string]uint64{
-					"0":        6,
-					"36499456": 4,
+					"0": 6,
 				},
 				Sprint: map[string]uint64{
-					"0":        64,
-					"36499456": 16,
+					"0": 64,
 				},
 				BackupMultiplier: map[string]uint64{
 					"0": 2,
diff --git a/internal/cli/server/chains/mumbai.go b/internal/cli/server/chains/mumbai.go
index daa4a2bea7..3858ad68d6 100644
--- a/internal/cli/server/chains/mumbai.go
+++ b/internal/cli/server/chains/mumbai.go
@@ -30,24 +30,19 @@ var mumbaiTestnet = &Chain{
 			LondonBlock:         big.NewInt(22640000),
 			Bor: &params.BorConfig{
 				JaipurBlock: big.NewInt(22770000),
-				DelhiBlock:  big.NewInt(29389056),
 				Period: map[string]uint64{
 					"0":        2,
 					"25275000": 5,
-					"29389056": 2,
 				},
 				ProducerDelay: map[string]uint64{
-					"0":        6,
-					"29389056": 4,
+					"0": 6,
 				},
 				Sprint: map[string]uint64{
-					"0":        64,
-					"29389056": 16,
+					"0": 64,
 				},
 				BackupMultiplier: map[string]uint64{
 					"0":        2,
 					"25275000": 5,
-					"29389056": 2,
 				},
 				ValidatorContract:     "0x0000000000000000000000000000000000001000",
 				StateReceiverContract: "0x0000000000000000000000000000000000001001",
diff --git a/internal/cli/server/chains/test_files/chain_legacy_test.json b/internal/cli/server/chains/test_files/chain_legacy_test.json
index 785c8cf855..7adf825b0e 100644
--- a/internal/cli/server/chains/test_files/chain_legacy_test.json
+++ b/internal/cli/server/chains/test_files/chain_legacy_test.json
@@ -17,21 +17,17 @@
     "bor": {
       "period": {
         "0": 2,
-        "25275000": 5,
-        "29389056": 2
+        "25275000": 5
       },
       "producerDelay": {
-        "0": 6,
-        "29389056": 4
+        "0": 6
       },
       "sprint": {
-        "0": 64,
-        "29389056": 16
+        "0": 64
       },
       "backupMultiplier": {
         "0": 2,
-        "25275000": 5,
-        "29389056": 2
+        "25275000": 5
       },
       "validatorContract": "0x0000000000000000000000000000000000001000",
       "stateReceiverContract": "0x0000000000000000000000000000000000001001",
@@ -47,8 +43,7 @@
       "burntContract": {
         "22640000": "0x70bcA57F4579f58670aB2d18Ef16e02C17553C38"
       },
-      "jaipurBlock": 22770000,
-      "delhiBlock": 29389056
+      "jaipurBlock": 22770000
     }
   },
   "nonce": "0x0",
diff --git a/internal/cli/server/chains/test_files/chain_test.json b/internal/cli/server/chains/test_files/chain_test.json
index 37b0131fbf..9dc949e6f2 100644
--- a/internal/cli/server/chains/test_files/chain_test.json
+++ b/internal/cli/server/chains/test_files/chain_test.json
@@ -19,21 +19,17 @@
         "bor":{
           "period":{
             "0":2,
-            "25275000": 5,
-            "29389056": 2
+            "25275000": 5
           },
           "producerDelay":{
-            "0": 6,
-            "29389056": 4
+            "0": 6
           },
           "sprint":{
-            "0": 64,
-            "29389056": 16
+            "0": 64
           },
           "backupMultiplier":{
             "0": 2,
-            "25275000": 5,
-            "29389056": 2
+            "25275000": 5
           },
           "validatorContract":"0x0000000000000000000000000000000000001000",
           "stateReceiverContract":"0x0000000000000000000000000000000000001001",
@@ -49,8 +45,7 @@
           "burntContract":{
             "22640000":"0x70bcA57F4579f58670aB2d18Ef16e02C17553C38"
           },
-          "jaipurBlock":22770000,
-          "delhiBlock": 29389056
+          "jaipurBlock":22770000
         }
       },
       "nonce":"0x0",
diff --git a/params/config.go b/params/config.go
index 92473b1146..a480218e22 100644
--- a/params/config.go
+++ b/params/config.go
@@ -350,24 +350,19 @@ var (
 		LondonBlock:         big.NewInt(22640000),
 		Bor: &BorConfig{
 			JaipurBlock: big.NewInt(22770000),
-			DelhiBlock:  big.NewInt(29389056),
 			Period: map[string]uint64{
 				"0":        2,
 				"25275000": 5,
-				"29389056": 2,
 			},
 			ProducerDelay: map[string]uint64{
-				"0":        6,
-				"29389056": 4,
+				"0": 6,
 			},
 			Sprint: map[string]uint64{
-				"0":        64,
-				"29389056": 16,
+				"0": 64,
 			},
 			BackupMultiplier: map[string]uint64{
 				"0":        2,
 				"25275000": 5,
-				"29389056": 2,
 			},
 			ValidatorContract:     "0x0000000000000000000000000000000000001000",
 			StateReceiverContract: "0x0000000000000000000000000000000000001001",
@@ -404,17 +399,14 @@ var (
 		LondonBlock:         big.NewInt(23850000),
 		Bor: &BorConfig{
 			JaipurBlock: big.NewInt(23850000),
-			DelhiBlock:  big.NewInt(36499456),
 			Period: map[string]uint64{
 				"0": 2,
 			},
 			ProducerDelay: map[string]uint64{
-				"0":        6,
-				"36499456": 4,
+				"0": 6,
 			},
 			Sprint: map[string]uint64{
-				"0":        64,
-				"36499456": 16,
+				"0": 64,
 			},
 			BackupMultiplier: map[string]uint64{
 				"0": 2,