diff --git a/core/genesis.go b/core/genesis.go
index 910a3fb0f5..24318ab72c 100644
--- a/core/genesis.go
+++ b/core/genesis.go
@@ -294,6 +294,14 @@ 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
@@ -307,6 +315,22 @@ 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:
 //