SIP Trunk not working after upgrade

Hi all, I’m having some strange problems with my SIP trunk after I upgraded.

The SIP trunk was working great, and after the upgrade, I saw that calls were not going out of this trunk (this trunk is only for outgoing calls). The trunk is registering with my provider, but when I try to make a call through it, my pbx automatically takes the next trunk on the trunk sequence, and if I only leave this trunk in the trunk sequence, then I get the “All circuits are busy now”.

Is there a known problem with SIP trunks and Upgrading?

Best regards to you all,