diff --git a/statediff/indexer/database/sql/postgres/database.go b/statediff/indexer/database/sql/postgres/database.go
index 3bb1f524a..36feb2baa 100644
--- a/statediff/indexer/database/sql/postgres/database.go
+++ b/statediff/indexer/database/sql/postgres/database.go
@@ -40,7 +40,7 @@ type DB struct {
 func (db *DB) InsertHeaderStm() string {
 	return `INSERT INTO eth.header_cids (block_number, block_hash, parent_hash, cid, td, node_id, reward, state_root, tx_root, receipt_root, uncle_root, bloom, timestamp, mh_key, times_validated, coinbase)
 			VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15, $16)
-			ON CONFLICT (block_hash, block_number) DO UPDATE SET (parent_hash, cid, td, node_id, reward, state_root, tx_root, receipt_root, uncle_root, bloom, timestamp, mh_key, times_validated, coinbase) = ($3, $4, $5, array_cat(eth.header_cids.node_id, $6), $7, $8, $9, $10, $11, $12, $13, $14, eth.header_cids.times_validated + 1, $16)`
+			ON CONFLICT (block_hash, block_number) DO UPDATE SET (parent_hash, cid, td, node_id, reward, state_root, tx_root, receipt_root, uncle_root, bloom, timestamp, mh_key, times_validated, coinbase) = ($3, $4, $5, ARRAY(SELECT DISTINCT e FROM unnest(array_cat(eth.header_cids.node_id, $6)) AS a(e)), $7, $8, $9, $10, $11, $12, $13, $14, eth.header_cids.times_validated + 1, $16)`
 }
 
 // InsertUncleStm satisfies the sql.Statements interface
diff --git a/statediff/indexer/database/sql/writer.go b/statediff/indexer/database/sql/writer.go
index 2b4debf4f..7282346ca 100644
--- a/statediff/indexer/database/sql/writer.go
+++ b/statediff/indexer/database/sql/writer.go
@@ -46,9 +46,10 @@ func (w *Writer) Close() error {
 }
 
 /*
+//UPDATE
 INSERT INTO eth.header_cids (block_number, block_hash, parent_hash, cid, td, node_id, reward, state_root, tx_root, receipt_root, uncle_root, bloom, timestamp, mh_key, times_validated, coinbase)
 VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15, $16)
-ON CONFLICT (block_hash, block_number) DO UPDATE SET (block_number, parent_hash, cid, td, node_id, reward, state_root, tx_root, receipt_root, uncle_root, bloom, timestamp, mh_key, times_validated, coinbase) = ($1, $3, $4, $5, array_cat(eth.header_cids.node_id, $6), $7, $8, $9, $10, $11, $12, $13, $14, eth.header_cids.times_validated + 1, $16)
+ON CONFLICT (block_hash, block_number) DO UPDATE SET (block_number, parent_hash, cid, td, node_id, reward, state_root, tx_root, receipt_root, uncle_root, bloom, timestamp, mh_key, times_validated, coinbase) = ($1, $3, $4, $5, ARRAY(SELECT DISTINCT e FROM unnest(array_cat(eth.header_cids.node_id, $6)) AS a(e)), $7, $8, $9, $10, $11, $12, $13, $14, eth.header_cids.times_validated + 1, $16)
 */
 func (w *Writer) upsertHeaderCID(tx Tx, header models.HeaderModel) error {
 	nodeIds := []string{w.db.NodeID()}