Chubb for Jefferson? is Adding to strong RB core worth losing WR1?

I was just offered Chubb for Jefferson, half point 10 man league. I’m 10-2 and in first place, 2 games ahead.

Current Roster:

RB’s: Kamara, Mixon, Moss, and perine / ingram as handcuffs
WR’s: Jefferson, Cooks, Godwin, Bateman, E. Sanders

On paper it seems like a no brainer, but is adding chubb to an already solid RB core worth losing my #1 WR?

Is this dynasty, redraft, or keeper? What is your starting lineup requirement?

It’s redraft, no keepers. it’s QB, 2WR, 2RB, TE and flex