Slashing protection history file can get too big (mine was 178MB) and fail to import on the destination. Prysm will timeout trying to import to the keymanager, without specifying this. I had to import my Prysm-exported keystore files omitting the slashing history protection file to get the Prysm import to work.
Source: https://docs.prylabs.network/docs/advanced/migrating-keys
Request: (how can we help?)
Slashing protection history file can get too big (mine was 178MB) and fail to import on the destination. Prysm will timeout trying to import to the keymanager, without specifying this. I had to import my Prysm-exported keystore files omitting the slashing history protection file to get the Prysm import to work.