Because the new version has reduced the storage requirements and network bandwidth requirements, but we found that porting from POC block data is very difficult, the previous block data can not be changed, they carry a lot of blank occupancy, and each block is hashed Locking can't be cropped. this is the reason why the migration failed yesterday. after considering it, we think that restarting a new mainnet is an optimal choice, so the data of the blockchain will be very small, and the hardware requirements are very low, which is very convenient for people to install a full-node wallet.
The ratio has not been determined yet