Free lines and porting out paid line

I'm currently on Go5G plus with 10 voice lines, 3 paid, 7 free. One of my paid line wants to port out, and I'm wondering if there's a risk any of my free lines might fall off. More specifically, the 2nd most ancient line wants to port out, and I have the following free lines in order of being added: 2020 LOU, 2020 LOU2, 2020 LOU3, 2020 LOU4, 2021 LOU6, 2016 F&F (converted from a MI in late 2021, which bumped me to a 9L MM plan), 2023 LOU P6 (the only AAL at this time) In May 2023 I switched to Go5G+ which I believe puts my plan under true price lock. I've had many problems with free lines falling off over the years, especially when switching plans, but ultimately they've always been corrected by T-Force. More recently last year I temporarily added a paid voice line to switch a free line number (the F&F one) and port it out while keeping the free line (with a new number) and everything stuck. However I'm a little more cautious now since the line that wants to port out is a line part of the "core 2", and that was on the account before all of my free lines were added. On the positive side, line 3 is a paid one too, but was technically added in 2019, when I already had the F&F line, but still as a MI line (didn't know I could convert it at the time) Anyone has recent experience with somewhat similar situations and can tell me if I risk having anything fall off when I'm porting out that paid line? I'm not particularly looking forward to potentially spend months to try to get things fixed again. I hear the systems have recently complained about less that 4 paying lines when F&F lines are involved. Also wondering if touching the core lines might make the system think I'm no longer price lock eligible. Thanks in advance to the super knowledgeable community here, I wouldn't have such a sweet deal of a plan without you.