Upgrading to SQL 2019

Hello,

We’re looking into setting up Bigfix Insights, but it requires SQL 2017 or later. Our BF root server is running v10.0.0.133 on SQL 2016, however, all the relay servers, BES client agents are running BELOW 9.5.17. Could we still upgrade to SQL 2019 or do we need to bring our relays/best client agents to a minimum of 9.5.17 before doing so?