Cannot add task ‘wrapper‘ as a task with that name already exists.

Build file 'D:\Nanjing-SVN\UVCCameraProDemoLTS-v5.02\build.gradle' line: 27
A problem occurred evaluating root project 'UVCCameraProDemoLTS-v5.02'.
> Cannot add task 'wrapper' as a task with that name already exists.
* Try:
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* Exception is:
org.gradle.api.GradleScriptException: A problem occurred evaluating root project 'UVCCameraProDemoLTS-v5.02'.
  at org.gradle.groovy.scripts.internal.DefaultScriptRunnerFactory$ScriptRunnerImpl.run(DefaultScriptRunnerFactory.java:93)

task wrapper(type: Wrapper) {
  gradleVersion = '4.4'
}

wrapper {
  gradleVersion = '4.4'
}