attempted to redefine uncommitted sequence (%d) for namespac

Error message

attempted to redefine uncommitted sequence (%d) for namespace %s with unchanged content

What it means

The org is approving the next sequence (current+1) which is not yet committed, but the proposed content is byte-for-byte identical to the org's existing uncommitted approval (or committed definition). Lifecycle rejects a no-op write to avoid an empty transaction.

Source

Thrown at core/chaincode/lifecycle/lifecycle.go:487

		redefine, err := ef.isAttemptToRedefine(privateName, packageID, requestedSequence, cd, orgState)
		if err != nil {
			return err
		}
		if redefine {
			return errors.Errorf("attempted to redefine the current committed sequence (%d) for namespace %s", currentSequence, ccname)
		}
	}

	// if requested sequence is not committed, and attempt is made to update its content,
	// we need to check whether new definition actually contains updated content, to avoid
	// empty write set.
	if requestedSequence == currentSequence+1 {
		redefine, err := ef.isAttemptToRedefine(privateName, packageID, requestedSequence, cd, orgState)
		if err != nil {
			return err
		}
		if redefine {
			return errors.Errorf("attempted to redefine uncommitted sequence (%d) for namespace %s with unchanged content", requestedSequence, ccname)
		}
	}

	if err := ef.Resources.Serializer.Serialize(NamespacesName, privateName, cd.Parameters(), orgState); err != nil {
		return errors.WithMessage(err, "could not serialize chaincode parameters to state")
	}

	// set the package id - whether empty or not. Setting
	// an empty package ID means that the chaincode won't
	// be invocable. The package might be set empty after
	// the definition commits as a way of instructing the
	// peers of an org no longer to endorse invocations
	// for this chaincode
	if err := ef.Resources.Serializer.Serialize(ChaincodeSourcesName, privateName, &ChaincodeLocalPackage{
		PackageID: packageID,
	}, orgState); err != nil {
		return errors.WithMessage(err, "could not serialize chaincode package info to state")
	}

View on GitHub (pinned to 2736b63f8f)

Solutions

If a real upgrade is intended, change the definition (new package ID via packaged chaincode, updated initialization parameters, or endorsement policy)
If no change is intended, do not re-approve; proceed directly to the commit step
Adjust retry logic to detect an existing matching approval and skip re-approval

Example fix

// before
peer lifecycle chaincode approveformyorg -C mychannel --sequence 2 --package-id same:pkgid  # unchanged
// after
peer lifecycle chaincode approveformyorg -C mychannel --sequence 2 --package-id <new-hash-of-updated-package>

Defensive patterns

Strategy: validation

Validate before calling

// Before approving seq N+1, confirm the content actually differs
prev := orgApprovedDefinition(ch, ccname, seq)
if prev != nil && prev.PackageID == def.PackageID && paramsEqual(prev, def) {
    return nil // unchanged; skip approval
}

Try / catch

err := ef.ApproveChaincodeDefinitionForOrg(...)
if err != nil && strings.Contains(err.Error(), "unchanged content") {
    // either proceed to commit (no change intended) or change package/params and retry
}

Prevention

Only bump the sequence together with an actual content change
Hash the definition (package ID + params + policy) and compare before approving
Fix retry loops to skip approve steps when nothing changed

When it happens

Trigger: Approving sequence N+1 with the exact same package ID and parameters as the already-approved definition at that org state — e.g., re-approving after a failed commit without changing anything, or re-running the same approve command twice.

Common situations: Retry loops that re-approve without changes; intending to change the chaincode but the package ID/parameters stayed identical; forgetting to bump sequence only when content changes.

Related errors

AI-assisted analysis of hyperledger/fabric@2736b63f8f (2026-09-04). Data as JSON: /api/errors/083b5802c5a907a2. Report an issue: GitHub.