in data base Example

 

65 Red potion  sellable set 'true'

 

GM can sell item..

 

but,player other cann't sell item..

 

Help Me plz.

just change to true and accept should work

I presume you're using navicat. If that is the case, then make sure you click on the tic to save your changes.

 

Also make sure to use //reload items ingame. Server reboot should do it  as well.