i had this one,

solution


1. go to tools-> wallet repair--> rebuild index->  then send all your coins to another wallet or even to coinsmarket
2. Set wrong Ip number on your wallet configuration file
3. restart wallet -> w8 for sync->  debug mode -> masternode start
it should tell you that it cannot start due to IP

THen Delete your adresses
make a new one send exacrlt 1k coins   to it
and more or les after step 3 start new masternode like you already did