Hello @Bossy,
Welcome to the forum!
This file is generated when you use a setup command. This error indicates, that you provided a wrong path to the identity. This node has been using a different identity before.
Please restore this file, if possible and find a correct identity for this data.
You may use this method to check the identity to see does it match the required NodeID (for that you need to know the previous NodeID, not the current one, which doesn’t match):
if you have previous logs you can figure out what NodeID was before.
If it’s a new node, then simple generate a new identity and run the setup command, but you need to delete config.yaml to allow the command to finish.
If this node is worked before, but its identity is lost, you can delete it, its data and start from scratch. It will not work with a foreign identity anyway.