Gradle子项目无法升级：找不到wrapper任务问题咨询

项目结构 #

repo
|--orchestration
   |--build.gradle
   |--settings.gradle
   |--gradle
   |  |--7.5.1
   |--engine
   |  |--build.gradle
   |  |--gradle
   |  |  |--6.7.1
   |--process
   |  |--build.gradle
   |  |--gradle
   |  |  |--6.1.1
   |  |  |--7.4

各目录Gradle版本信息 #

orchestration % which gradle
/opt/homebrew/bin/gradle
orchestration % gradle --version
------------------------------------------------------------
Gradle 7.5.1
------------------------------------------------------------
orchestration % ./gradlew --version
------------------------------------------------------------
Gradle 7.5.1
------------------------------------------------------------
cd engine
engine % ./gradlew --version
------------------------------------------------------------
Gradle 6.7.1
------------------------------------------------------------
cd ../process 
process % ./gradlew --version
------------------------------------------------------------
Gradle 6.1.1
------------------------------------------------------------

当前遇到的问题 #

执行子项目Gradle Wrapper升级命令时，提示找不到wrapper任务：

process % gradle wrapper --gradle-version 7.5.1

FAILURE: Build failed with an exception.

* What went wrong:
Task 'wrapper' not found in project ':process'.

cd ../engine
engine % gradle wrapper --gradle-version 7.5.1

FAILURE: Build failed with an exception.

* What went wrong:
Task 'wrapper' not found in project ':engine'.

咨询问题 #

1. 为何过去能升级子项目？
2. 为何Gradle常给出无用的诊断信息，甚至误导排查方向？
3. 已执行--scan扫描，但仍无有效排查线索，仅修复了两个弃用问题。

内容的提问来源于stack exchange，提问作者Eric Kolotyluk