How can i fix this ERROR?

[ERROR] addons/_bwhitelist-revamped-1-9/lua/bwhitelist/sh.lua:144: Calling net.Start with unpooled message name! [http://goo.gl/qcx0y]

This is the error and I dont understand what it means. Otherwise, I would fix it, but I can't cause im not a skilled coder. Can someone please help me try to fix the problem.

Edited

[ERROR] addons/_bwhitelist-revamped-1-9/lua/bwhitelist/sh.lua:144: Calling net.Start with unpooled message name! [http://goo.gl/qcx0y]

1. Start - [C]:-1
2. nets - addons/_bwhitelist-revamped-1-9/lua/bwhitelist/sh.lua:144 3. unknown - addons/_bwhitelist-revamped-1-9/lua/bwhitelist/cl.lua:55

here is what it fully says