Active Roles Synchronization fails with "Object synchronization method was called from an unsynchronized block of code" (206976)

In Active Roles Synchronization Service, the Update operation for group objects fails and the following error is displayed:

This operation would deadlock because the reply cannot be received until the current Message completes processing. If you want to allow out-of-order message processing, specify ConcurrencyMode of Reentrant or Multiple on ServiceBehaviorAttribute

1. Copy the supplied file Active_Roles-7.0.2-SOL206976.exe.rename to the One Identity Active Roles 7.0.2 computer.
2. Remove the .rename file name extension.
3. Run the file Active_Roles-7.0.2-SOL206976.exe and follow the on-screen instructions to complete the hotfix installation.