v2.8.3 - fix(config): resolve DuplicateOptionError on startup and normalize mapping keys

- Remove duplicate case variations from DEFAULT_MAPPINGS
- Enforce lowercase normalization and deduplication in load_config
- Acknowledge @zxinyun (52pojie) for discovering the root cause

CHANGELOG.md

@@ -4,7 +4,15 @@ QPyPack 项目的所有重要变更都将记录在此文件中。
 
 [English Version](./CHANGELOG_EN.md) | **中文**
 这里为你准备的 **QPyPack v2.8.1** 精简版 Release/Changelog（分为**中文版**和**英文版**，可直接复制到 GitHub Release 或发布公告中）：
-这里为你整理的 **精简版 Changelog** 与 **GitHub 提交记录**：
+
+---
+
+## [2.8.3] - 2026-09-05
+
+### 修复
+- 修复因默认包名映射表中存在大小写重复键导致启动崩溃的问题（特别鸣谢 52pojie 论坛的 @zxinyun）
+- 优化配置项初始化与写入逻辑，在启动和保存时自动对映射表键名进行小写规整与去重处理
+- 增强配置文件解析异常时的回退机制与缺项自动补全的健壮性
 
 ---
 

CHANGELOG_EN.md

@@ -6,6 +6,15 @@ All notable changes to the **QPyPack** project will be documented in this file.
 
 ---
 
+## [2.8.3] - 2026-09-05
+
+### Fixed
+- Fixed a startup crash (`configparser.DuplicateOptionError`) caused by case-insensitive duplicate keys in `DEFAULT_MAPPINGS` (Special thanks to @zxinyun from 52pojie).
+- Optimized configuration initialization and saving logic to automatically normalize mapping keys to lowercase and handle deduplication.
+- Enhanced robustness of configuration error fallback and missing-key auto-remediation.
+
+---
+
 ## [2.8.2] - 2026-09-04
 
 ### Fixed

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "qpypack"
-version = "2.8.2"
+version = "2.8.3"
 description = "A cross-platform GUI packaging and compilation suite based on PyInstaller and Nuitka."
 readme = "README_EN.md"
 authors = [

qpypack/main.py

@@ -125,7 +125,7 @@ except ImportError:
     HAS_QT_AUDIO = False
 
 __app_name__ = "QPyPack"
-__version__ = "2.8.2"
+__version__ = "2.8.3"
 __author__ = "QwejayHuang"
 __company__ = "Qwesoft"
 __description__ = "Modern Cross-Platform Python Packaging GUI Powered by PyInstaller & Nuitka"
@@ -779,9 +779,7 @@ PYPI_MIRRORS_GLOBAL = [
 
 DEFAULT_MAPPINGS = {
     "crypto": "pycryptodome",
-    "Crypto": "pycryptodome",
     "cryptodome": "pycryptodome",
-    "Cryptodome": "pycryptodome",
     "nacl": "pynacl",
     "jwt": "PyJWT",
     "OpenSSL": "pyOpenSSL",
@@ -900,7 +898,7 @@ def load_config(retry=True):
         default_backup = "https://mirrors.aliyun.com/pypi/simple/"
 
     if not os.path.exists(CONFIG_FILE):
-        config["Mappings"] = DEFAULT_MAPPINGS
+        config["Mappings"] = {k.lower(): v for k, v in DEFAULT_MAPPINGS.items()}
         config["Settings"] = {
             "language": "auto",
             "engine": "PyInstaller",
@@ -950,14 +948,14 @@ def load_config(retry=True):
                 return load_config(retry=False)
             else:
                 if "Mappings" not in config:
-                    config["Mappings"] = DEFAULT_MAPPINGS
+                    config["Mappings"] = {k.lower(): v for k, v in DEFAULT_MAPPINGS.items()}
                 if "Settings" not in config:
                     config["Settings"] = {}
                 if "BackportRules" not in config:
                     config["BackportRules"] = DEFAULT_BACKPORT_RULES
 
         if "Mappings" not in config:
-            config["Mappings"] = DEFAULT_MAPPINGS
+            config["Mappings"] = {k.lower(): v for k, v in DEFAULT_MAPPINGS.items()}
         else:
             updated_map = False
             for k, v in DEFAULT_MAPPINGS.items():