Hi JBelinha. the problem was that the segments that we were passing through the VPN tunnel were not the same. here the detail is that on both sides there have to be exactly the same segments that are allowed to pass. For example, if on one side of the tunnel you are passing segments 10.0.0.0/24, 172.16.0.0/24 and 192.168.10.0/24 on the other side, the same segments must be configured. The failure originates from the segments of both sites not coinciding in the renegotiation process. Sorry for the redundancy but that was the solution. check the segments of both firewalls. I hope this solution helps you. Greetings.
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