Leak at Alde boiler hot water connection

I noticed a slow leak at the pex to fitting connection as noted by the green arrow in the photo below. I may have disrupted that connection while dismantling the Alde glycol loop, though it really should not be that fragile if done correctly. While I was exploring the connection, it came apart entirely. It appears to be a push connection (sharkbite or similar). I'm not going to use the Alde on the next trip, but of course need to address this soon. As a temporary solution, will draining the Alde hot water tank and opening the Alde bypass valve prevent the tank from filling again and therefore remove water from that connection?

I'm not too familiar with this type of connection. I tried pushing the pipe firmly back into the connector, but I don't think that did it. Will I need to replace the conical fitting (which I assume incorporates the sharkbite)? Any other ideas from the T@B experts on this forum?