I'm not sure,
But, before i changed my lab, i had created the same p2mp in the main vMX (Of couse, this LSP is down because the main vMX in my lab just a CE router, so the mpls did not run), and the commit command can be performed. The message :
'static-lsp P2MP-TEST'
Referenced point-to-multipoint static LSP does not exist
does not show anymore.
So, i dont know that there is something shared between LSYS and the main router of vMX.