It seems you have piggy token but not the real coin itself your case i like cryptonex coin.
Everytime i get that message also when i try to send my cryptonex to an exchange
I thought the same, but Cryptonex support told me, that we have tokens which can't be placed on coin exchanges.
"Later Cryptonex team will announce a new bounty program and you will be able to exchange your tokens for CNX coins without any conditions.
The rate will be announced later"