Error: Program type already present: okhttp3.RequestBody

[maxutolen]

Hello community!

I'm trying to integrate "com.liveperson.android:lp_messaging_sdk:3.9.0" library. But I'm getting this error while compiling an application:
Caused by: com.android.tools.r8.CompilationFailedException: Compilation failed to complete Caused by: com.android.tools.r8.utils.AbortException: Error: Program type already present: okhttp3.RequestBody$1

I suppose it's related to okhttp3 library, soI tried to exclude okhttp3 from LivePersonChat library, because I already have okhttp3 in my application. I did like this, but it didn't work:
implementation("com.liveperson.android:lp_messaging_sdk:3.9.0") { exclude group: 'com.squareup.okhttp3.RequestBody', module: 'okhttp' }
Also tried excluding like these, still no success:
exclude group: "com.squareup.okhttp3" // didn't work
exclude group: 'com.squareup.okhttp', module: 'okhttp' // didn't work

I'm using the following versions of okhttp3 library:
implementation "com.squareup.okhttp3:okhttp:3.8.1"
implementation "com.squareup.okhttp3:logging-interceptor:3.8.1"
implementation "com.squareup.okhttp3:okhttp-urlconnection:3.4.1"
Tried to change the okhttp3 version till 4.0.0, but no result.

Please, assist me