diff --git a/internal/service/package/terms.go b/internal/service/package/terms.go
index 34697c0..d87fb16 100644
--- a/internal/service/package/terms.go
+++ b/internal/service/package/terms.go
@@ -9,13 +9,13 @@ import (
 // ValidateExpiryBaseOverride 校验显式提交的分配生效条件覆盖。
 func ValidateExpiryBaseOverride(value *string, submitted bool) (*string, error) {
 	if !submitted {
-		return nil, errors.New(errors.CodeInvalidParam, "expiry_base_override 字段未提交，须显式传值（null 或合法枚举）")
+		return nil, errors.New(errors.CodeInvalidParam, "生效条件覆盖字段未提交，须显式传值（null 或合法枚举）")
 	}
 	if value == nil {
 		return nil, nil
 	}
 	if *value != constants.PackageExpiryBaseFromActivation && *value != constants.PackageExpiryBaseFromPurchase {
-		return nil, errors.New(errors.CodeInvalidParam, "expiry_base_override 枚举值非法，合法值：from_activation, from_purchase")
+		return nil, errors.New(errors.CodeInvalidParam, "生效条件覆盖值非法，合法值为：购买即生效、实名激活时生效")
 	}
 	return value, nil
 }