My Verizon Samsung S5 is not taking Metro PCS chip, how can I get this to work?

[AC Question]

Verizon Samsung S5 not taking Metro PCS chip

Hi ! I have A Verizon Samsung S5 that I want to use for my Metro Pcs number. I have put in the chip but its saying "this sim card is from an unknown source". Can anyone help me out ? Im not tech savvy so please explain like im 5 ... Thank you soooo much !!