Transfer unconfirmed since 5/5

Something seems not right there.
You sent a tx on Syscoin v3 which did not go through because v3 chain is old and dead.

You updated to v4. Doing it you should have dumped your keys in v3 and imported them into a new v4 wallet. The v4 wallet and chain have no info about the tx you tried to do on the v3 chain. How can it show as transfer in progress?

Please follow the guide to update to v4.

If you follow the steps described in there, your last valid balance from the v3 chain should show up in the v4 wallet.