looking for some solutions? You are welcome.

SOLVED: Upgrading Corda Flow causes error on next run: TransactionVerificationException$ContractConstraintRejection

Chad Grimaldi:

As mentioned in the docs on performing flow upgrades, all you need to do is basically shut down the node, replace JAR, and start the node back up. When I do this, when my upgraded flow is run the next time, I get the following error:

net.corda.core.contracts.TransactionVerificationException$ContractConstraintRejection: Contract constraints failed for com.company.project.contract.MyContract, transaction: ABCDEFG

And the flow does not complete as a result. What am I doing wrong?

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