PIVX 3.1.0 coming soon...
If you have any $PIVX zPIV in your wallet, you should convert them back to PIV by sending them back to your own address. Then add enablezeromint=0 into your pivx.conf file to prevent any new auto minting to zPIV. You can use zPIV again after upgrading to upcoming 3.1.0 wallet.
Reason why is because current version of $PIVX zPIV is v1 and it cannot stake once zPoS goes live. Only zPIV v2 that's newly minted using the upcoming 3.1.0 core wallet can stake & give you higher rewards. P.S. You can still stake base coin PIV if you don't want to stake zPIV.