Edit: ahh I have 0.16.0.0 (did it go in the later one - I can't actually broadcast the blockchain anyway so don't see a need to upgrade)?
I mean, there was quite some drama about running anything younger than v16.3, due to the "bug" that was found in v14-v16?
If you only occasionally run Bitcoin Core, then it's not necessary to run out and upgrade it right this second. However, you should upgrade it before you next run it.
- You should not run any version of Bitcoin Core other than 0.16.3*. Older versions should not exist on the network. If you know anyone who is running an older version, tell them to upgrade it ASAP.https://bitcointalk.org/index.php?topic=5034070.0Might still be smart to upgrade to v17.0.... Although, if you're not running a full node, this bug might be not quite as harmful/have the potential to be harmful at all..?