const otherErrorsInChangeShardKeyMsg = "was converted into a distributed transaction";
...
// Some return paths will strip out the TransientTransactionError label. We want to still
// filter out those errors.
let skippableErrors = [
    ErrorCodes.StaleConfig,
    ErrorCodes.WriteConflict,
    ErrorCodes.LockTimeout,
    ErrorCodes.PreparedTransactionInProgress,
    ErrorCodes.ShardInvalidatedForTargeting
];

// If we're running in a stepdown suite, then attempting to update the shard key may
// interact with stepdowns and transactions to cause the following errors. We only expect
// these errors in stepdown suites and not in other suites, so we surface them to the test
// runner in other scenarios.
const stepdownErrors =
    [ErrorCodes.NoSuchTransaction, ErrorCodes.ConflictingOperationInProgress];

if (this.runningWithStepdowns) {
    skippableErrors.push(...stepdownErrors);
}

// Failed in the document shard key path, but not with a duplicate key error
if (errMsg.includes(otherErrorsInChangeShardKeyMsg)) {
    return skippableErrors.includes(errCode);
}