diff --git a/pkg/sql/row/writer.go b/pkg/sql/row/writer.go
index 0b48284faa61..6e90b7bcb440 100644
--- a/pkg/sql/row/writer.go
+++ b/pkg/sql/row/writer.go
@@ -139,7 +139,13 @@ func prepareInsertOrUpdateBatch(
 			if !ok {
 				continue
 			}
-
+			// Skip any values with a default ID not stored in the primary index,
+			// which can happen if we are adding new columns.
+			if skip, err := helper.skipColumnNotInPrimaryIndexValue(family.DefaultColumnID, values[idx]); err != nil {
+				return nil, err
+			} else if skip {
+				continue
+			}
 			typ := fetchedCols[idx].GetType()
 			marshaled, err := valueside.MarshalLegacy(typ, values[idx])
 			if err != nil {
diff --git a/pkg/sql/rowenc/index_encoding.go b/pkg/sql/rowenc/index_encoding.go
index 680490ec2539..70b6a9446570 100644
--- a/pkg/sql/rowenc/index_encoding.go
+++ b/pkg/sql/rowenc/index_encoding.go
@@ -1074,6 +1074,14 @@ func EncodePrimaryIndex(
 		// The decoders expect that column family 0 is encoded with a TUPLE value tag, so we
 		// don't want to use the untagged value encoding.
 		if len(family.ColumnIDs) == 1 && family.ColumnIDs[0] == family.DefaultColumnID && family.ID != 0 {
+			// Single column value families which are not stored can be skipped, these
+			// may exist temporarily while adding a column.
+			if !storedColumns.Contains(family.DefaultColumnID) {
+				if cdatum, ok := values[colMap.GetDefault(family.DefaultColumnID)].(tree.CompositeDatum); !ok ||
+					!cdatum.IsComposite() {
+					return nil
+				}
+			}
 			datum := findColumnValue(family.DefaultColumnID, colMap, values)
 			// We want to include this column if its value is non-null or
 			// we were requested to include all of the columns.
diff --git a/pkg/sql/schema_changer_test.go b/pkg/sql/schema_changer_test.go
index ec67a05ffb15..8264ea988bba 100644
--- a/pkg/sql/schema_changer_test.go
+++ b/pkg/sql/schema_changer_test.go
@@ -3144,9 +3144,6 @@ CREATE TABLE t.test (
 		// backfill. This should have the same number of Puts
 		// as there are CPuts above.
 		fmt.Sprintf("Put /Table/%d/3/2/0 -> /BYTES/0x0a030a1302", tableID),
-		// TODO (rohany): this k/v is spurious and should be removed
-		//  when #45343 is fixed.
-		fmt.Sprintf("Put /Table/%d/3/2/1/1 -> /BYTES/0x0a020104", tableID),
 		fmt.Sprintf("Put /Table/%d/3/2/2/1 -> /BYTES/0x0a030a3306", tableID),
 		fmt.Sprintf("Put /Table/%d/3/2/4/1 -> /BYTES/0x0a02010c", tableID),
 
@@ -3185,7 +3182,6 @@ CREATE TABLE t.test (
 		// The temporary indexes are delete-preserving -- they
 		// should see the delete and issue Puts.
 		fmt.Sprintf("Put (delete) /Table/%d/3/2/0", tableID),
-		fmt.Sprintf("Put (delete) /Table/%d/3/2/1/1", tableID),
 		fmt.Sprintf("Put (delete) /Table/%d/3/2/2/1", tableID),
 		fmt.Sprintf("Put (delete) /Table/%d/3/2/3/1", tableID),
 		fmt.Sprintf("Put (delete) /Table/%d/3/2/4/1", tableID),
@@ -3213,7 +3209,6 @@ CREATE TABLE t.test (
 		// The temporary index for the newly added index sees
 		// a Put in all families.
 		fmt.Sprintf("Put /Table/%d/3/3/0 -> /BYTES/0x0a030a1302", tableID),
-		fmt.Sprintf("Put /Table/%d/3/3/1/1 -> /BYTES/0x0a020106", tableID),
 		fmt.Sprintf("Put /Table/%d/3/3/2/1 -> /BYTES/0x0a030a3306", tableID),
 		fmt.Sprintf("Put /Table/%d/3/3/4/1 -> /BYTES/0x0a02010c", tableID),
 		// TODO(ssd): double-check that this trace makes
@@ -3243,7 +3238,6 @@ CREATE TABLE t.test (
 		// The temporary index sees a Put in all families even though
 		// only some are changing. This is expected.
 		fmt.Sprintf("Put /Table/%d/3/3/0 -> /BYTES/0x0a030a1302", tableID),
-		fmt.Sprintf("Put /Table/%d/3/3/1/1 -> /BYTES/0x0a020106", tableID),
 		fmt.Sprintf("Put /Table/%d/3/3/3/1 -> /BYTES/0x0a02010a", tableID),
 	}
 	require.Equal(t, expected, scanToArray(rows))