Proactive Threat Protection shows very OLD definitions ( 1 year older)

We have SEPM Server which run 12.1.6 RU6 in our environment. This server is responsible for amanaging the endpoints in our environment. There are 5000+ endpoints .The SEPM server had a SEP client which is receiving latest SONAR updates from Server Side SEPM.

Last LiveUpdate is  Sunday10th April

Contents are downloaded as attached

Firstly, which feature updates Proactive Threat Protection? SONAR or Truscan?

Multiple clients are showing different Proactive Definition dates.

We need to Update all the clients with latest Proactive Definitions from SEPM.

Need your quick valuable suggestion.