Errors/Chain errors
TargetBlockNumberInPast
Check the argument values against the operation schema
The scheduler was given a dispatch block that is not in the future. Compare the when argument against the current block number and choose a strictly later block.
Declared by the Scheduler 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 TargetBlockNumberInPast.