Debug losing connection with Stm32WB55 target

[GYV]

Code is written using stm32CubeMX. Connecting with stmlink V3 Minie. 
Executing step by step, it appears that debug fails (lose connection) when executing debug_init. In fact debug_init creates the problem when programming pa13.
When removing the initialization of PA13 and PA14 in debug init, things seems to work but I have no idea of potential side effect. 
An recommendation?

[GYV]

Yes. this is true. I am at a very early stage of my project amd will likely have to refine the CubeMx definitions. So I choose to place it in a place that should survive code re-generation from cubeMX.