diff --git a/core/genesis.go b/core/genesis.go
index 24318ab72c..910a3fb0f5 100644
--- a/core/genesis.go
+++ b/core/genesis.go
@@ -294,14 +294,6 @@ func (o *ChainOverrides) apply(cfg *params.ChainConfig) error {
 	}
 	if o.OverrideAmsterdam != nil {
 		cfg.AmsterdamTime = o.OverrideAmsterdam
-		// Amsterdam (EIP-7928 BAL) doesn't change blob parameters. When the
-		// bundled config has no amsterdam blobSchedule entry yet, inherit the
-		// most recent preceding fork's so CheckConfigForkOrder validates.
-		if cfg.BlobScheduleConfig != nil && cfg.BlobScheduleConfig.Amsterdam == nil {
-			if prev := latestBlobConfig(cfg.BlobScheduleConfig); prev != nil {
-				cfg.BlobScheduleConfig.Amsterdam = prev
-			}
-		}
 	}
 	if o.OverrideBPO1 != nil {
 		cfg.BPO1Time = o.OverrideBPO1
@@ -315,22 +307,6 @@ func (o *ChainOverrides) apply(cfg *params.ChainConfig) error {
 	return cfg.CheckConfigForkOrder()
 }
 
-// latestBlobConfig returns the blob configuration of the most recent fork
-// defined in bs (scanning newest-first, excluding Amsterdam/UBT), or nil if none
-// is set. Used to give a newly-overridden fork sensible blob parameters.
-func latestBlobConfig(bs *params.BlobScheduleConfig) *params.BlobConfig {
-	for _, c := range []*params.BlobConfig{
-		bs.BPO5, bs.BPO4, bs.BPO3, bs.BPO2, bs.BPO1,
-		bs.Osaka, bs.Prague, bs.Cancun,
-	} {
-		if c != nil {
-			return c
-		}
-	}
-
-	return nil
-}
-
 // SetupGenesisBlock writes or updates the genesis block in db.
 // The block that will be used is:
 //
diff --git a/params/config.go b/params/config.go
index 1d69335f97..f31e53dde7 100644
--- a/params/config.go
+++ b/params/config.go
@@ -997,6 +997,7 @@ func (c *ChainConfig) CheckConfigForkOrder() error {
 		name      string
 		timestamp *uint64
 		config    *BlobConfig
+		inherits  bool // fork introduces no blob params; inherits the latest prior fork's schedule
 	}{
 		{name: "cancun", timestamp: c.CancunTime, config: bsc.Cancun},
 		{name: "prague", timestamp: c.PragueTime, config: bsc.Prague},
@@ -1006,14 +1007,17 @@ func (c *ChainConfig) CheckConfigForkOrder() error {
 		{name: "bpo3", timestamp: c.BPO3Time, config: bsc.BPO3},
 		{name: "bpo4", timestamp: c.BPO4Time, config: bsc.BPO4},
 		{name: "bpo5", timestamp: c.BPO5Time, config: bsc.BPO5},
-		{name: "amsterdam", timestamp: c.AmsterdamTime, config: bsc.Amsterdam},
+		// Amsterdam (EIP-7928 BAL) doesn't change blob parameters. The blob
+		// resolver (eip4844.latestBlobConfig) has no Amsterdam case and falls
+		// through to Osaka, so an explicit amsterdam blob entry isn't required.
+		{name: "amsterdam", timestamp: c.AmsterdamTime, config: bsc.Amsterdam, inherits: true},
 	} {
 		if cur.config != nil {
 			if err := cur.config.validate(); err != nil {
 				return fmt.Errorf("invalid chain configuration in blobSchedule for fork %q: %v", cur.name, err)
 			}
 		}
-		if cur.timestamp != nil {
+		if cur.timestamp != nil && !cur.inherits {
 			// If the fork is configured, a blob schedule must be defined for it.
 			if cur.config == nil {
 				return fmt.Errorf("invalid chain configuration: missing entry for fork %q in blobSchedule", cur.name)