3.2 release OTA差分包制作失败，报错信息如下：

$python3 build_update.py -s $OTA_DIR_PATH/output_package/source.zip $OTA_DIR_PATH/target_package/ $OTA_DIR_PATH/output_package/ -pk $OTA_DIR_PATH/rsa_private_key2048.pem

2023-09-07 08:46:56 INFO : VERSION.mbn file parsing complete! path: /home/xxx/OHOS/OpenHarmony_v3.2_Release/OTA_Package/target_package/updater_config/VERSION.mbn
2023-09-07 08:46:56 INFO : BOARD.list file parsing complete! path: /home/xxx/OHOS/OpenHarmony_v3.2_Release/OTA_Package/target_package/updater_config/BOARD.list
2023-09-07 08:46:56 INFO : XML file parsing completed!
2023-09-07 08:46:56 INFO : []
2023-09-07 08:46:56 ERROR : There is no incremental image, the - S parameter is not required!
2023-09-07 08:46:56 ERROR : Uncaught exception
Traceback (most recent call last):
  File "build_update.py", line 916, in <module>
    main()
  File "build_update.py", line 880, in main
    if incremental_processing(
  File "build_update.py", line 769, in incremental_processing
    raise RuntimeError
RuntimeError
2023-09-07 08:46:56 INFO : Exception occurred, Resource cleaning completed!

$OTA_DIR_PATH/target_package/为out/下生成的images

报错信息显示未找到增量image，不清楚$OTA_DIR_PATH/output_package/source.zip 是怎么来的，用的前一次生成的full package