You may want to check your config.yaml, as db location is specified there. Just make sure that it is V2 in the db name. You may also want to check, whether wallet db got also updated to V2, and eventually check what config.yaml says about it.
full_node:
database_path: D:/chia-db/blockchain/blockchain_v2_CHALLENGE.sqlite
...
wallet:
database_path: D:/chia-db/wallet/blockchain_wallet_v2_CHALLENGE_KEY.sqlite