diff --git a/backend/cmd/migrate/main.go b/backend/cmd/migrate/main.go
index c2ecfe6..60639d1 100644
--- a/backend/cmd/migrate/main.go
+++ b/backend/cmd/migrate/main.go
@@ -187,7 +187,7 @@ func migratePrices(sqliteDB *sql.DB, mysqlDB *sql.DB) error {
 			model           string
 			modelType       string
 			billingType     string
-			channelType     string
+			channelType     uint
 			currency        string
 			inputPrice      float64
 			outputPrice     float64
@@ -199,7 +199,7 @@ func migratePrices(sqliteDB *sql.DB, mysqlDB *sql.DB) error {
 			tempModel       sql.NullString
 			tempModelType   sql.NullString
 			tempBillingType sql.NullString
-			tempChannelType sql.NullString
+			tempChannelType sql.NullInt64
 			tempCurrency    sql.NullString
 			tempInputPrice  sql.NullFloat64
 			tempOutputPrice sql.NullFloat64
@@ -226,7 +226,7 @@ func migratePrices(sqliteDB *sql.DB, mysqlDB *sql.DB) error {
 		`,
 			id, model, modelType, billingType, channelType, currency,
 			inputPrice, outputPrice, priceSource, status, createdAt, updatedAt,
-			createdBy, tempModel.String, tempModelType.String, tempBillingType.String, tempChannelType.String,
+			createdBy, tempModel.String, tempModelType.String, tempBillingType.String, tempChannelType.Int64,
 			tempCurrency.String, tempInputPrice.Float64, tempOutputPrice.Float64, tempPriceSource.String, updatedBy.String,
 		)
 		if err != nil {
diff --git a/backend/models/price.go b/backend/models/price.go
index 2c79a59..b10cc1b 100644
--- a/backend/models/price.go
+++ b/backend/models/price.go
@@ -38,7 +38,7 @@ func CreatePriceTableSQL() string {
 		model VARCHAR(255) NOT NULL,
 		model_type VARCHAR(50) NOT NULL,
 		billing_type VARCHAR(50) NOT NULL,
-		channel_type VARCHAR(50) NOT NULL,
+		channel_type BIGINT UNSIGNED NOT NULL,
 		currency VARCHAR(10) NOT NULL,
 		input_price DECIMAL(10,6) NOT NULL,
 		output_price DECIMAL(10,6) NOT NULL,
@@ -50,7 +50,7 @@ func CreatePriceTableSQL() string {
 		temp_model VARCHAR(255),
 		temp_model_type VARCHAR(50),
 		temp_billing_type VARCHAR(50),
-		temp_channel_type VARCHAR(50),
+		temp_channel_type BIGINT UNSIGNED,
 		temp_currency VARCHAR(10),
 		temp_input_price DECIMAL(10,6),
 		temp_output_price DECIMAL(10,6),