Unresolved reference: currentVersion

[Jordantan1999]

May I know how to retrieve the currentVersion parameter? Because I a getting this error in cmd

  Line 35:         if (isNonStable(candidate.version) && !isNonStable(currentVersion)) {
                                                                      ^ Unresolved reference: currentVersion

by running this command

./gradlew dependencyUpdates

[Jordantan1999]

I changed my plugin version from

plugins {
 id("com.github.ben-manes.versions") version "0.20.0"
}

to

plugins {
 id("com.github.ben-manes.versions") version "0.42.0"
}