The log shows Received Aggressive Mode request (Phase 1)

IKE Responder: Received Aggressive Mode request (Phase 1)

The SonicWall has received a request to begin Aggressive Mode negotiation.

If this log message shows in the SonicWall that actually initiated an Aggressive Mode request, the remote peer will likely have an INVALID_ID_INFO error. Check the SA name for both units. The SA name in each SonicWall must be the same as the Unique Firewall Identifier (UFI) of the remote peer when using Aggressive Mode. The UFI is located on the VPN Summary page.