Errors/Chain errors
SpecVersionNeedsToIncrease
Check the argument values against the operation schema
The new runtime's spec_version is not greater than the current one, so the upgrade is rejected. Check the RuntimeVersion in the new wasm and bump spec_version above the version currently on chain.
Declared by the System pallet; it classifies to the semantic code invalid_argument.
Remediation
Check the argument values against the operation schema
The same explanation is available in the terminal: btcli explain SpecVersionNeedsToIncrease.