Long Span Cantilever

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Hi, 

I am designing a long span cantilever beam, 

I just want to confirm that the bracing system if defined as truss functions as bracing resisting transverse loads only. ? When I tried to release (Fy, Mx, MZ,My) i got warnings . 

Second, 

I want to reduce the first fixed support capacity and distribute along the second, as the near to cantilever support is taking all the load and site conditions will not allow to have such a connection. 

is there a way to reduce the load on one fixed support and transfer it to the second ? 

Attached STAAD Model 

Thanks